Publications

Publications

Peer Reviewed Journal PUBLICATIONS (till 2014)

  1. In-situ x-ray diffraction, electrical resistivity and thermal measurements using a Paris-Edinburgh cell at HPCAT 16BM-B beam line, Jason Baker, Ravhi S. Kumar, Nenad Velisavljevic, Changyang Park, Curtis Kenny-Benson, Yoshiya Kono, Andrew Cornelius and Yusheng Zhao, J.Phys.C, 500, 142003, 2014
  2. Structural stability of WS2 under high pressures, Nirup Bandaru, Ravhi S. Kumar, Oliver Tschauner, Jason Baker, Thomas Hartmann, Yusheng Zhao and Rama Venkat, Int.J.Mod.Phys.B, 28, 1450168 (2014)
  3. High pressure structural transformations of PbCrO4 up to 51.2 GPa : An angle dispersive x-ray diffraction study, D. Errandonea and Ravhi S. Kumar, Materials Research Bulletin, 60, 206 (2014)
  4. Effect of pressure and temperature of structural stability of MoS2, Nirup Bandaru, Ravhi S. Kumar, Daniel Sneed, Oliver Tschauner, Jason Baker, Daniel Antonio, Sheng-Nian Luo, Thomas Hartmann, Yusheng Zhao and Rama Venkat, J. Phys.Chemistry C, 118, 3230 (2014)
  5. Pressure induced valence change of Eu in EuFe2As2 at low temperature and high pressures probed by resonant inelastic x-ray scattering, Ravhi S. Kumar, Y. Zhang, A. Thamizhavel, A. Svane, G. Vaitheeswaran, V. Kancahana, Y. Xiao, P. Chow and Changfeng Chen, Applied Phys.Lett., 104, 042601 (2014)
  6. Structural, electrical, and thermoelectric properties of CrSi2 thin films, A. Quader, Rama Venkat, Ravhi S. Kumar, Thomas Hartmann, Paolo Ginobbi, N. Newman and R. Singh, Thin Solid Films, 545,100 (2013)
  7. High pressure phase of the post-barite phase in BaCrO4 hashemite, D. Santamaria-Perez, Ravhi S. Kumar, J. Dos Santos-Garcia, D. Errandonea, R. Chulia Jordan, R. Saez-Puche, P. Rodriguez-Hernandez and A. Munoz, Phys.Rev.B., 86, 094116 (2013)
  8. Pressure-induced valence and structural changes in YbMn2Ge2-Inelastic x-ray spectroscopy and theoretical investigations, Ravhi S. Kumar, A. Svane, G. Vaitheeswaran, Y. Zhang, V. Kanchana, M. Hoffmann, S.J. Campbell, Y. Xiao, P. Chow, C. Chen, Y. Zhao and A.L.Cornelius, Inorganic Chemistry, 52, 832 (2013)
  9. High Pressure Structural and Transport Measurements of InTe, GaTe, and InGaTe2, Matthew Jacobsen, Y.Meng, Ravhi S. Kumar, and Andrew L. Cornelius, Journal of Physics and Chemistry of Solids, 74, 723 (2013).
  10. New high pressure phase and equation of state of Ce2Zr2O8, D. Errandonea, Ravhi S. Kumar, S.N Achary,O. Gomis, F.J. Manjin, R. Shukla and A.K. Tyagi, J. Appl.Phys., 111, 053519 (2012)
  11. Transport properties of Ni and PbTe under pressure, M. Jacobsen, Ravhi S. Kumar and A.L. Cornelius, J. Electronic Mat., 41, 633 (2012)
  12. Correlation between superconductivity and structural properties under pressure of iron pnictide superconductor Ce0.6Y0.4FeAsO0.8F0.2,M. Kanagaraj, S. Arumugam, Ravhi S. Kumar, N.R. Tamil Selvan, S. Esakki Muthu, J. Prakash, G.S. Thakur, H. Yoshino, K. Murata, K. Matsubayashi, Y. Uwatoko, S. Sinogeikin, A.L. Cornelius and Y. Zhao,  Applied Phys.Lett., 100, 052601 (2012)
  13. High pressure transport characteristics of Bi2Te3, Sb2Te3 and BiSbTe3, M.K. Jacobsen, S. Sinogeikin, Ravhi Kumar and A.L. Cornelius, J. Phys.Chem.Solids., 73, 1154 (2012)
  14. Pressure induced high spin-low spin transition in FeSe superconductor studied by x-ray emission spectroscopy and ab-initio calculations., Ravhi S. Kumar, Y. Zhang, Y. Xiao, J. Baker, A.L. Cornelius and Y. Zhao., App. Phys. Letters., 99, 061913 (2011)
  15. Pressure effect on crystal structure and superconductivity of La8Th0.2FeAsO., Ravhi S. Kumar, D. Antonio, M. Kanagaraj, S. Arumugam, A.L. Cornelius, S. Sinogeikin, J. Prakash, G.S. Thakur, T. Hartmann and Y. Zhao., Phys.Stat.Solidi – Rapid Res.Lett., 5, 208 (2011)
  16. Pressure induced structural transition and enhancement of superconductivity in Co doped CeFeAsO., Ravhi S. Kumar, D. Antonio, M. Kanagaraj, S. Arumugam, S. Sinogeikin, J. Prakash, G.S. Thakur, A.L. Cornelius, and Y. Zhao., Appl.Phys.Lett., 98, 012511 (2011)
  17. Synthesis,structuralandmagneticpropertiesofspinladdercompound Ca1_xCoxCu2O3, C. Sekar, S.Paulraj, G.Krabbes, M.Kanagaraj, S.Arumugam and Ravhi S.Kumar, J.Mag and Magnetic Materials. 323, 3033 (2011)
  18. Pressure induced structural transitions in europium to 92 GPa., Phys.Rev.B., 104106 (2011)
  19. Bi, Y. Meng, Ravhi S. Kumar, A.L.Cornelius, W.W. Tipton, R.G.Henning, Y. Zhang, C. Chen and J.S.Schilling, Phys.Rev.B., 83, 104106 (2011)
  20. High Pressure Study of Substrate Material ScAlMgO4, D. Errandonea, Ravhi S. Kumar, Ruiz-Fuertes, A. Segura, and E. Haussühl, Phys. Rev. B, 83, 144104 (2011)
  21. Experimental and theoretical study of structural properties and phase transitions in YAsO4 and YCrO4, D. Errandonea, Ravhi S. Kumar, J. López-Solano, P. Rodríguez-Hernández, A. Muñoz, M. G. Rabie, and R. Sáez Puche, Rev. B, 83, 134109 (2011)
  22. Insitu high pressure synchrotron x-ray diffraction study of CeVO4 and TbVO4 up to 50 GPa.,Errandonea, Ravhi S. Kumar, S.N. Achary and A.K. Tyagi., Phys.Rev.B., 84 224121 (2011)
  23. Lithium hydroxide dehydrate: A new type of icy material at elevated pressure, O.Tschauner, B. Kiefer, M. Nicol, S. Sinogeikin, Ravhi S. Kumar and A.L. Cornelius, J. Chem.Phys, 134, 044526 (2011)
  24. Crystal and Electronic Structure of FeSe at High Pressure and Low Temperature, Ravhi S. Kumar, Yi Zhang, Stanislav Sinogeikin, Yuming Xiao, Sathish Kumar , Paul Chow , Andrew L. Cornelius  and Changfeng Chen, Physical Chemistry B 114, 12597 (2010)
  25. Inelastic x-ray experiments on B4C under high static compression, Ravhi S. Kumar, D. Dandekar, A.L. Jasper, T. Tanaka, Y.Xiao, P. Chow, M.F. Nicol and A.L. Cornelius., Diamond and Related Materials, 19, pp530,( 2010)
  26. Structural phase transitions and thermoelectric properties of AgPb18SbTe20 under compression, Ravhi S. Kumar, M. Balasubramanian, M. Jacobsen, A. Bommannavar, M. Kanatzidis, S. Yoneda and A.L. Cornelius., Electronic Materials, 39, 1828 (2010)
  27. Pressure induced structural changes in the potential hydrogen storage compound ammonia borane: A combined x-ray, neutron and theoretical investigation, Ravhi S. Kumar, X.Ke, Jianzhong Zhang, Zhijun Lin, Sven C. Vogel, Monika Hartl, Stanislav Sinogeikin, Luke Daemen, Andrew L. Cornelius, Changfeng Chen and Yusheng Zhao,  Chemical Phys. Letters , 495, 203 (2010)
  28. High pressure structural study of fluoro-perovskite CsCdF3 upto 60 GPa – A combined experimental and theoretical study, G. Vaitheeswaran, V. Kanchana, Ravhi S. Kumar, A.L. Cornelius, M.F. Nicol, A. Svane, N.E. Christensen and O. Eriksson, Rev.B., 81, 075105 (2010)
  29. Theoretical and experimental study of the structural stability of TbPO4 at high pressures, López-Solano, P. Rodríguez-Hernández, A. Muñoz, O. Gomis, D. Santamaría-Perez, D. Errandonea, F. J. Manjón, Ravhi S. Kumar, E. Stavrou,and C. Raptis, Phys.Rev.B, 81, 144126, (2010)
  30. Experimental investigation of ThGeO4 at high pressure, D. Errandonea, Ravhi S. Kumar, Garcia, A. Beltran, S.N. Achary and A.K. Tyagi., Phys.Rev.B., 80, 094101 (2009) 
  31. Structural studies on Na75CoO2 thermoelectric material at high pressures, Ravhi S. Kumar, S. Rekhi, D. Prabhakaran, M. Somayazulu, E. Kim, J.D. Cook, T. Stemmler and A.L. Cornelius, Solid State Communications., 149, 1712 (2009)
  32. Structural phase transitions in RbbH4 under compression, Ravhi S. Kumar and A.L. Cornelius, Alloys and Compounds, 476, 5 (2009)
  33. Post-spinel transformations and equation of state in ZnGa2O4: Determination at high pressure by insitu x-ray diffraction, Daniel Errandonea, Ravhi S. Kumar, F.J. Manjon, V.V. Ursaki andE.V. Rusu, Rev.B, 79, 024103 (2009)
  34. Pressure-induced valence change in YbAl3: A combined high-pressure inelastic x-ray scattering and theoretical investigation , Ravhi S. Kumar, Axel Svane, G. Vaitheeswaran, V. Kanchana, E.D. Bauer, M. Hu, Malcolm F. Nicol and Andrew L. Cornelius, Rev.B., 78, 075117 (2008)
  35. High-pressure x-ray diffraction study on the structure and phase transitions of the defect –stannite ZnGa2Se4 and defect-chalcopyrite CdGa2S4 Daniel Errandonea, Ravhi S. Kumar, F.J. Manjon, V.V. Ursaki and M. Tiginyanu, Journal of Applied Physics, 104, 063524 (2008)
  36. Effect of pressure and temperature on structural stability of potential hydrogen storage compound Li3AlH6, Ravhi S. Kumar, X. Ke, A.L. Cornelius and C. Chen, Phys.Lett., 460, 442 (2008)
  37. Structural Phase Transitions in the Potential Hydrogen Storage Compound KBH4 under Compression, Ravhi S. Kumar, Eunja Kim, and Andrew L. Cornelius, Phys. Chem. B, 112, 8452 (2008)
  38. Magnetic ordering in UCu2Si2 at high pressure, A.L. Cornelius, Ravhi S. Kumar, M.K. Jacobsen, E.D. Bauer, J.L. Sarrao and Z. Fisk, Physica B., 403, 940 (2008)
  39. High pressure structural studies on SrRuO3, M.K. Jacobsen, Ravhi S.Kumar, G. Cao, J.J. Neumeier and A.L. Cornelius, Phys.Chem. of solids, 69, 2237 (2008)
  40. High-pressure X-ray diffraction study of SrMoO4 and pressure-induced structural changes, Daniel Errandonea, Ravhi S. Kumar, Xinghua Ma and Chaoyang Tu, Solid State Chem., 181, 355 (2008)
  41. Pressure-driven phase transitions in NaBH4: Theory and experiments , Eunja Kim, Ravhi S. Kumar, Philippe F Weck, Andrew Cornelius, Malcolm F Nicol, Sven C. Vogel, Jianzhong Zhang, Monika Hartl, Ashley C. Stowe, Luke Daemen, and   Yusheng Zhao, Phys.Chem.B. 111, 13873 (2007)
  42. High-pressure structural, elastic, and electronic properties of the scintillator host material KMgF3, G. Vaitheeswaran,G. V. Kanchana, Ravhi S. Kumar, A.L Cornelius,. M.F Nicol, A. Svane, A. Delin and B. Johansson, Rev.B ,76, 014107 (2007)
  43. Pressure-induced structural phase transition in NaAlH4, Ravhi S. Kumar, E. Kim, O. Tschauner, A. Cornelius, M. P. Sulic, and C. M.Jensen, Rev. B, 75, 174110 (2007)
  44. Bonding changes in single wall carbon nanotubes (SWCNT) on Ti and TiH2 addition probed by X-ray Raman scattering , Ravhi S. Kumar, Andrew L. Cornelius, Michael G. Pravica, Malcolm F. Nicol, Michael Y. Hu and Paul C. Chow, Diamond and Related Materials, 16, 1136 (2007)
  45. X-ray Raman scattering studies on C60 fullerenes and multiwalled carbon nanotubes under pressure, Ravhi S. Kumar, Andrew L. Cornelius, Michael G. Pravica, Malcolm F. Nicol, Michael Y.Hu and Paul C. Chow, Diamond and Related Materials, 16, 1250 (2007)
  46. High pressure structure of Tb2Ti2O7 pyrochlore at cryogenic temperature, Ravhi S. Kumar, Andrew L. Cornelius, Maddury Somayazulu, Daniel Errandonea, Malcolm F. Nicol and Jason Gardner, Status. Sol. (b) 244, 266 (2007)
  47. Equation of state on nanocrystalline BaTiO3 up to 52 GPa at room temperature, Ravhi S. Kumar, Andrew L. Cornelius and Malcolm F. Nicol, Status. Sol. (b) 244, 290 (2007)
  48. High pressure structural studies of dysprosium using angle dispersive x-ray diffraction, Yong Rong Shen, Ravhi S. Kumar, Andrew L. Cornelius and Malcolm F. Nicol Rev.B., 75, 064109 (2007)
  49. Structure of nanocrystalline ZnO up to 86 GPa, Ravhi S. Kumar, Andrew Cornelius and Malcolm F. Nicol ,Current Applied Physics., 7, 135 (2007)
  50. Crystal satability and pressure induced phase transitions in scheelite AWO4 (A = Ca, Sr, Ba, Pb, Eu) binary oxides. I: A review of recent ab initio calculations ADXRD, XANES and Raman studies Lopez-Soleno, P. Rodriguez- Hernandez, S. Radescu, A. Mujica, A. Munoz, D. Errandonea, F. J. Manjon, J. Pellicer-Porres, N. Garro, A. Segura, Ch. Ferrer-Roca,  Ravhi S. Kumar, O. Tschauner and A. Aquilanti, Phys. Status. Sol. (b) 244, 325 (2007)
  51. Crystal satability and pressure induced phase transitions in scheelite AWO4 (A = Ca, Sr, Ba, Pb, Eu) binary oxides. II: Towards a systematic understanding F. J. Manjon, D. Errandonea, J. Lopez-Soleno, P. Rodriguez- Hernandez, S. Radescu, A. Mujica, A. Munoz, N. Garro, J. Pellicer-Porres, A. Segura, Ch.Ferrer-Roca, Ravhi S. Kumar, O. Tschauner and A. Aquilanti, Status.Sol. (b) 244, 328 (2007)
  52. High pressure x-ray diffraction studies of Bi2-xSbxTe3 (x=0, 1, 2), M.K. Jacobsen, Ravhi S. Kumar, A.L. Cornelius, S.V. Sinogeiken and M.F. Nicol, AIP Proceedings, 955, 171 (2007)
  53. High Pressure Structure of LaSr2Mn2O7 Bilayer Manganite, Ravhi S. Kumar, D.Prabhakaran, A.T. Boothroyd, Malcolm F. Nicol, and Andrew Cornelius, Phys. Chem. Solids, 67, 2046 (2006)
  54. Structural Properties of GdSr2RuCu2O8 under Strong Compression, Ravhi S. Kumar, Andrew L. Cornelius, J. Janaki, T. Geetha Kumary, and Malcolm F. Nicol, AIP Proceedings – LT24 International Conference, P545, 2006
  55. Pressure-induced structural transitions in Tb-pyrochlore oxides, Ravhi S. Kumar, Andrew L Cornelius, Malolm F Nicol, Kinson C Kam, Anthony K Cheetam, Jason S Gardner, Applied Physics Letters, 88, 031903 (2006)
  56. Determination of high-pressure crystal structure of BaWO4 and PbWO4 , D. Eraandonea, J. Pellicer Porres, F. J. Manjon, A. Segura, Ch. Ferrer-Roca, S.Kumar, O. Tschauner, J. Lopez Solano, P. Rodriguez Hernandez, S. Radescu, A. Mujica, A. Munoz and G. Aquilanti , Phys.Rev.B., 73, 224103 (2006)
  57. Structural transitions in NaBH4 under pressure, Ravhi S. Kumar and Andrew L. Cornelius , Applied Phys.Lett., 87, 261916 (2005)
  58. Novel Pressure Induced Structural Phase Transition in AgSbTe2. Ravhi S. Kumar, Andrew L. Cornelius, Eunja Kim, Yongrong Shen, S. Yoneda, Chanfeng Chen and Malcolm F. Nicol, Rev.B., 72, 060101(R), (2005)
  59. High-pressure structural study of the scheelite tungstates CaWO4 and SrWO4, D. Eraandonea, J. Pellicer Porres, F. J. Manjon, A. Segura, Ch. Ferrer-Roca, S.Kumar, O. Tschauner, J. Lopez Solano, P. Rodriguez Hernandez, S. Radescu, A. Mujica, A. Munoz and G. Aquilanti      Phys.Rev.B., 72,174106 (2005)
  60. Structural Behavior of Non-Oxide Perovskite Superconductor MgCNi3 at pressures up to 32 GPa Ravhi S. Kumar, A.L. Cornelius, Yongrong Shen, T. Geetha, Kumary, J. Janaki, M. C. Valsakumar and Malcolm F. Nicol, Physica B., 363,190 (2005)
  61. The crystal structure of CeRhIn5 under pressure, Ravhi S. Kumar, H. Kohlmann, B. E. Light, Andrew Cornelius, V. Raghavan, T. W. Darling and J. L. Sarrao, Physica B., 359, 407 (2005)
  62. Compressibility of Nb2AsC up to 41 GPa, Ravhi S. Kumar, Sandeep Rekhi, Andrew Cornelius and M. Barsoum, Phys. Lett., 86,111904 (2005)
  63. Disturbing the spin liquid state in Tb2Ti2O7: Heat capacity measurements on rare earth titanates A.L. Cornelius, B.E. Light, Ravhi S. Kumar, M. Eichenfield, T. Dutton, R. Pepin, and J.S. Gardner,  Physica B., 359, p1243 (2005)
  64. Response to the comment on “Characteristics of silicone fluid as a pressure transmitting medium in diamond  anvil  cells” Yongrong Shen, Ravhi S. Kumar, Michael Pravica and Malcolm F. Nicol,  Sci.Instrum., 76, 2145261 (2005)
  65. Compressibility of CeMIn5 and Ce2MIn8 (Rh,Ir and CO) compounds, Ravhi S. Kumar, Andrew Cornelius and J.L. Sarrao, Rev.B. 70, 2145261 (2004)
  66. Anisotropic elastic properties of CeRhIn5, Ravhi S. Kumar, H.Kohlmann, B.E Light, Andrew Cornelius, V.Raghavan, W.Darling  and  J.L Sarrao,  Phys. Rev.B., 69, 014515 (2004)
  67. Heat capacity studies of Ce and Rh site substitution in the heavy fermion  antiferromagnet  CeRhIn5; short  range  magnetic interaction and  non  fermi  liquid  behavior, B.E. Light, Ravhi S. Kumar, Andrew Cornelius, P.G Pagliuso and J.L. Sarrao , Rev. B., 69, 024419 (2004)
  68. Characteristics of silicone fluid as a pressure transmitting medium in diamond anvil cells Yongrong Shen, Ravhi S. Kumar, Michael Pravica and Malcolm F. Nicol, Sci. Instrum., 75, 4450 (2004)
  69. Uranium and Cerium compounds at high pressures and magnetic fields, Andrew Cornelius, Ravhi S. Kumar and B. E. Light, MRS Proceedings Volume 802, 263 (2004)
  70. Structural studies of CuAlSe2 and CuAlS2 chalcopyrites at high pressures, Ravhi S. Kumar, Sekar. A, Victor Jaya. N., Natarajan. S and Chichibu S., J.Alloys and Compounds, 312, 4 (2000)
  71. Synthesis and high pressure studies of AgSbSe2 , Ravhi S. Kumar, Sekar. A, Victor Jaya N and Natarajan. S, J. Alloys and Compounds, 285, 48 (1999)
  72. Design and fabrication of a simple pneumatic loading attachment for Mao-Bell and NBS  type diamond anvil cells, Ravhi S. Kumar, Sekar. A, Victor Jaya. N and Natarajan. S, Sci.Instrum., 70, 3074 (1999)
  73. High pressure x-ray diffraction studies of rare earth doped Bi2212 system, Ravhi S. Kumar, Sekar. A, Victor Jaya. N, and Natarajan. S, AIP Proceedings Volume 483, 265 (1999)
  74. Enhancement of Tc in Y2Ba4Cu4O14+y, Jeyabalan. K, Ravhi S. Kumar, Asokamani. R and Natarajan.S, Modern Phys. Lett.B., 9, 805 (1995)
  75. Synthesis and high pressure electrical resistivity studies of La-Ba-Ca-Cu-O system, Ravhi S. Kumar, Jeyabalan. K, Asokamani. R and Natarajan. S, Stat. Solidi (a), 151,393 (1994)

Presentations (Including invited talks)

  1. Investigation of structural and valence changes in Yb compounds under compression by combined inelastic x-ray scattering and theoretical calculations, Ravhi S. Kumar, Axel Svane, G.Vaitheeswaran, Y. Zhang, E.D. Bauer, V. Kanchana, Yuming Xiao, Paul Chow, Changfeng Chen, Yusheng Zhao and Andrew Cornelius, SMEC 2013, Caribbean
  2. In-situ x-ray diffraction, electrical resistivity and thermal measurements using a Paris-Edinburgh cell at HPCAT 16BM-B beam line, Jason Baker, Ravhi S. Kumar, Nenad Velisavljevic, Changyang Park, Curtis Kenny-Benson, Yoshiya Kono, Andrew Cornelius and Yusheng Zhao, AIRAPT conference 2012
  3. Pressure effect on Tc and crystal structure of Ce9F0.1Fe0.95Co0.05AsO, Ravhi S. Kumar, Daniel Antonio, Jason Baker, Andrew Cornelius, S. Arumugam, J. Prakash, Gohil S. Thakur, A.K Ganguly, and Yusheng Zhao, M2S conference, 2012, Washington DC
  4. Valence changes of Eu in EuFe2As2 at high pressure and low temperature, Ravhi S. Kumar, Yi Zhang, N. Kumar, S.K. Dhar, A. Thamizhavel, Yuming Xiao, Paul Chow, Changfeng Chen and Yusheng Zhao, Workshop at HPCAT, 2012, Advanced Photon Source, Chicago
  5. Effect of pressure on superconductivity and structural behavior of Iron based pnictides and selenides, Seminar talk at Florida International University, Oct.2012, Florida
  6. Crystal and electronic structure of FeSe at high pressure and low temperature, Yi Zhang, Ravhi S. Kumar, S. Sinogeiken, Y. Xiao, Sathish Kumar, P. Chow, A.L. Cornelius and C. Chen, APS march meeting, Portland, 2010
  7. Crystal and lattice dynamics of FeSi alloys under high pressure, Yi Zhang, Ravhi S. Kumar,   Fisk, Y. Xiao, Michael Hu, P. Chow, A.L. Cornelius and C. Chen, APS march meeting, Portland, 2010
  8. High pressure structure and thermal properties of Gallium and Indium telluride compounds, M. Jacobsen, Ravhi S. Kumar and A.L. Cornelius, APS march meeting, Portland, 2010
  9. Pressure induced structural transitions in the potential hydrogen storage compouind NH3BH3, APS March meeting 2009,Ravhi S. Kumar, Jianzhong Zhang, Monika Hartl, Zhijun Lin, Sven Vogel, Luke Daemen, Yusheng Zhao and Andrew Cornelius
  10. Thermoelectric properties of mechanically milled AgSbTe2, Sathish Kumar, Ravhi S. Kumar, S. Yoneda and A.L. Cornelius, APS March meeting 2009
  11. Thermoelectric properties of AgSbSe2, Makram Qader, Ravhi Kumar, Rama Venkat and A.L. Cornelius, APS March meeting 2009
  12. Equation of state of heavy fermion compounds at low temperature, Ravhi S. Kumar,L. Cornelius, S. Sinogeiken and H.P. Liermann, CDAC review, 2009
  13. Inelastic x-ray scattering experiments on B4C under high static pressures, Ravhi S. Kumar, D. Dandekar, A.L. Jasper, T. Takano, Y. Xiao, P. Chow, M.F.Nicol and A.L.Cornelius, Diamond 2009 conference held at Athens, Greece 2009
  14. Structural phase transitions and thermoelectric properties of AgPb18SbTe20 under compression, Ravhi S. Kumar, M. Subramanian, M. Jacobsen, A. Bommannavar, M. Kanatzidis, S. Yoneda and A.L. Cornelius, ICT 2009 held at Germany, July 2009
  15. Thermoelectric properties of Cu2SnTe3, Ravhi Kumar, R.D. Mascarenhaus, Sathish Kumar and A.L. Cornelius,  ICT 2009 held at Germany, July 2009
  16. Thermoelectric properties and pressure induced structural transitions in CuSbS2, Ravhi S. Kumar, Sathish Kumar, J. Paladuku, Rama Venkat and A.L. Cornelius, ICT 2009 held at Germany, July 2009
  17. Pressure induced structural transitions in the potential hydrogen storage compound NH3BH3, Ravhi S. Kumar, Jianzhong Zhang, Monika Hartl, Zhijun Lin, Sven Vogel, Luke Daemen, Andrew Cornelius, Malcolm Nicol and Yusheng Zhao, APS March meeting 2009, Pittspurgh, PA.
  18. Thermoelectric and electronic properties of AgSbSe2, Makram A. Qader, Ravhi S. Kumar, Rama Venkat and Andrew L. Cornelius, APS March meeting 2009, Pittspurgh, PA
  19. Thermoelectric properties of mechanically milled AgSbTe2, Sathish Kumar, Ravhi S. Kumar, S. Yoneda and A.L. Cornelius, APS March meeting 2009, Pittspurgh, PA
  20. Structural phase transitions in alkali borohydrides induced by pressure, Ravhi S. Kumar and A. L. Cornelius, International conference on Hydrogen and Hydrogen Storage – Methods and Materials, Indian Institute of Science, Bangalore, January 2009.
  21. Synthesis, structure and electronic properties of phase change material Sb55Se45, Ravhi S. Kumar, Nirup Reddy, Andrew Cornelius and Rama Venkat, SAMPE-08, Long Beach, CA 2008
  22. Structural changes in borohydride hydrogen storage materials, Ravhi S. Kumar, A.L. Cornelius and Malcolm F. Nicol, APS March meeting 2008, New Orleans
  23. Pressure induced valence changes of YbTe studied by resonant inelastic x-ray emission (RXES), Ravhi S Kumar, Andrew L. Cornelius, Yuming Xiao, Paul Chow and Malcolm F. Nicol, APS March meeting 2008,New Orleans, Lousiana
  24. Nuclear Resonant Inelastic X-ray Scattering (NRIXS) studies on FeSi up to 115 GPa, Ravhi S. Kumar, E. Kim, Andrew L. Cornelius and Malcolm Nicol, Gordon Research Conference – High Pressure, 2008
  25. Magnetic ordering in UCu2Si2 at high pressure, A.L. Cornelius, Ravhi S. Kumar, M.K. Jacobsen, E.D.Bauer, John L. Sarrao, and Z. Fisk, International Conference on Strongly Correlated Elecetron Systems (SCES), Texas, 2007
  26. High pressure structural studies on Li3AlH6 Ravhi S. Kumar and Andrew L. Cornelius, Study of Matter at Extreme Conditions (SMEC), Miami, Florida, 2007
  27. Valences changes in YbCu2Si2 and YbAgCu4 studied by high pressure x-ray absorption and       resonant inelastic x-ray scattering experiments, Ravhi S. Kumar, Andrew L. Cornelius, Malcolm F. Nicol, Michael Hu, Paul Chow, Eric D. Bauer and John L. Sarrao, Study of Matter at Extreme Conditions (SMEC), Florida, 2007
  28. Pressure induced structural phase transition in NaBH4, E. Kim, Ravhi S. Kumar, Andrew L. Cornelius, Malcolm F. Nicol, Sven Vogel, Jiangzhong Zhang, Monika Hartl, Ashley C. Stowe, Luke Daemen and Yuzheng Zhao, Study of Matter at Extreme Conditions (SMEC), Miami, Florida, 2007
  29. High pressure studies on ferromagnetic SrRuO3, A.L.Cornelius, Ravhi S. Kumar, M.K. Jacobsen, J.J. Hamlin, S. Deemyad, J.S. Schilling,G. Cao and J.J. Neumeier, Study of Matter at Extreme Conditions (SMEC), Miami, Florida, 2007
  30. Structural Changes in RbBH4 under Pressure Investigated by Synchrotron Powder X-ray Diffraction and Theoretical Studies, Ravhi S. Kumar, Eunja Kim and Andrew Cornelius, International Symposium on Materials Issues in a hydrogen economy, Richmond, Virginia 2007
  31. Structural Characterization of Sodium Borohydrides: Theory and Experiments, Eunja Kim, Ravhi Kumar, Andrew Cornelius, Malcolm Nicol, Sven Vogel, Jianzhong Zhang, Monika Hartl, Ashley C. Stowe, Luke Daemen, and Yusheng Zhao, International Symposium on Materials Issues in a hydrogen economy, Richmond, Virginia 2007
  32. High pressure phases of alkali ternary borohydrides, Ravhi S. Kumar and Andrew L. Cornelius, APS March meeting, Denver, 2007
  33. High pressure characterization of the thermoelectric Bi2Te3, M. Jacobsen, Ravhi S. Kumar and Andrew Cornelius, APS March meeting, Denver, 2007
  34. Pressure induced structural changes in alkali borohydrides, Ravhi S Kumar and Andrew L. Cornelius, Gordon Research Conference on High Pressure, Bideford, ME, 2006
  35. Structural and transport measurements on Bi2Te3 , M. Jacobsen, Ravhi S. Kumar, Andrew L. Cornelius, Gordon Research Conference on High Pressure, Bideford, ME, 2006
  36. Structural changes in the single walled carbon nanotubes (SWCNT) on Ti and TiH2 addition probed by x-ray Raman scattering, Ravhi S. Kumar, Andrew L. Cornelius, Michael Pravica, Malcolm Nicol, M. Hu and P. Chow, Diamond, 17the European conference on Diamond, Diamond-like materials, Carbon nanotubes and Nitrides, Estoril, Portugal, 2006
  37. X-ray Raman scattering studies on C60 fullerenes and multiwalled carbon nanotubes under pressure, Ravhi S. Kumar, Michael Pravica, Andrew L. Cornelius, Malcolm Nicol, M. Hu and      Chow, Diamond, 17the European conference on Diamond, Diamond-like materials, Carbon nanotubes and Nitrides, Estoril, Portugal, 2006
  38. Pressure induced structural changes in AgPb18SbTe20, Ravhi S. Kumar, Andrew L. Cornelius, M. Jacobsen, M. F. Nicol, Seiji Yoneda, APS March meeting, Baltimore, MD, 2006
  39. Structural changes in Bi2Te3 under pressure, M. Jacobsen, Ravhi S. Kumar, Andrew L. Cornelius, Peter Liermann, APS March meeting, Baltimore, MD, 2006
  40. Ambient and high pressure structural studies on TiH2, P. Kalita, Ravhi S. Kumar and Andrew L. Cornelius, APS March meeting, Baltimore, MD, 2006
  41. Structural transitions in NaBH4 under pressure, Ravhi S. Kumar and Andrew L. Cornelius, APS March meeting, Baltimore, MD, 2006
  42. Pressure induced B1 to B2 phase transition in AgSbSe2, E. Kim, Ravhi S. Kumar, Andrew L. Cornelius and Malcolm F. Nicol, APS March meeting, Baltimore, MD, 2006
  43. Combiend ADXRD, XANES and ab initio study of scintillating materials under high pressure, Errandonea, J. Pellicer-Porres, F.J. Manjón, A. Segura, Ch. Ferrer-Roca, Ravhi S. Kumar, O. Tschauner, P. Rodrìguez-Hernández, J. López-Solano, S. Radescu, Mújica, A. Muñoz, G. Aquilanti,  SRMS-5 conference, Chicago, 2006
  44. Structural transitions in ternary borohydrides : Possible hydrogen storage candidates, Andrew L. Cornelius and Ravhi S. Kumar, SRMS-5 conference, Chicago, 2006
  45. Pressure induced valence changes in YbAl3 studied by resonant inelastic x-ray emission, Ravhi S. Kumar, A. L. Cornelius, M. Hu, E.D. Bauer and J. L. Sarrao, SRMS-5 conference, Chicago, 2006
  46. Equation of state of nanocrystalline BaTiO3 upto 52 GPa at room temperature, Ravhi S. Kumar, Andrew L. Cornelius and Malcolm F. Nicol, International Conference on High Pressure Semiconductor Physics, Spain, 2006
  47. Crystal stability and pressure-induced phase transitions in scheelite CaWO4 and isostructural AWO4 (A = Sr, Ba, Pb, Eu) binary oxides: A Review of recent ADXRD, XANES, Raman and ab-initio studies, D. Errandonea, J. Pellicer-Porres,F. J. Manjón,N. Garro, A. Segura,Ch. Ferrer-Roca, S. Kumar, O. Tschauner, J. López-Solano, P. Rodríguez-Hernández,S. Radescu, Mújica, A. Muñoz, and G. Aquilanti, International Conference on High Pressure Semiconductor Physics, Spain, 2006
  48. High pressure structure of Tb2Ti2O7 pyrochlore at cryogenic temperatures, Ravhi S. Kumar, Andrew L. Cornelius, Malcolm F. Nicol, Madury Somayazulu, Daniel Errandonea and Jason Gardner, International Conference on High Pressure Semiconductor Physics, Spain, 2006
  49. High Pressure Structure of LaSr2Mn2O7 Bilayer Manganite, Ravhi S. Kumar, D.Prabhakaran, A.T. Boothroyd, Malcolm F. Nicol, and Andrew Cornelius, Study of Matter at Extreme Conditions (SMEC), Miami, Florida, 2005
  50. High pressure structure of Na75CoO2, Ravhi S. Kumar, Andrew Cornelius, Malcolm F Nicol, D. Prabhakaran and Andrew Boothrhoyd, APS March meeting, Los Angeles, USA, 2005
  51. Pressure induced valence changes in YbAl3 studied by resonant x-ray emission, Andrew Cornelius, Ravhi S. Kumar, Malcolm F Nicol, Michael Hu, Eric D.Bauer and J.L. Sarrao, APS March meeting, Los Angeles, USA, 2005
  52. Pressure effect on multiwalled carbon nanotubes up to 25 GPa probed by x-ray Raman Scattering, Malcolm F. Nicol, Ravhi S. Kumar, Andrew Cornelius, Michael Pravica and Michael Hu, APS March meeting, Los Angeles, USA, 2005
  53. Heat Capacity and Neutron Scattering Studies on Geometrically Frustrated Ho Perovskites,  Matthew Jacobsen, Daniel Antonio, Andrew Cornelius, Ravhi Kumar, J. Garden, Yiming Qiu, Cedomir Petrovic, APS March meeting, Los Angeles, USA, 2005
  54. Pressure induced structural transition in AgSbSe2 , Ravhi S. Kumar, Eunja Kim, Andrew L Cornelius, Yongrong Shen and Malcolm F Nicol, Joint AIRAPT and EHPRG Meeting held at Karlsruhe, Germany, 2005
  55. Magnetic ordering in UCu2Si2 at high pressure, Andrew L Cornelius, Ravhi S. Kumar and Mathew Jacobsen, Joint AIRAPT and EHPRG Meeting held at Karlsruhe, Germany, 2005
  56. Pressure effect on Multiwalled Carbon Nanotubes (MWCNT) up to 25 GPa probed by  x-ray Raman spectroscopy, Ravhi S. Kumar, Andrew Cornelius, Michael Pravica, Michael Hu and Malcolm F. Nicol, Optical Probes, Indian Institute of Science, Bangalore, India, 2005
  57. Structure of nanocrystalline ZnO up to 86 GPa, Ravhi S. Kumar, Andrew Cornelius and Malcolm F. Nicol, Optical Probes, Indian Institute of Science, Bangalore, India, 2005
  58. A new intermediate amorphous phase pathway in the B1-B2 transition of AgSbTe2, Ravhi S. Kumar, Yongrong Shen, Eunja Kim, Andrew Cornelius, S, Chenfeng Chen and Malcolm F. Nicol, Gordon Research Conference on High Pressure science and Technology, NH, USA, 2004
  59. High pressure investigation of elemental Dy up to 86 GPa, Yongrong Shen, Ravhi S. Kumar, Andrew Cornelius and Malcolm F. Nicol, Gordon Research Conference on High Pressure science and Technology NH, USA, 2004
  60. Pressure induced amorphization of Tb2Ti2O, Ravhi S. Kumar, Yongrong Shen, Andrew Cornelius and J. Gardener, APS March meeting, Montreal, Canada, 2004
  61. Heat capacity studies of Ce and Rh site substitution in the heavy  fermion  antiferromagnet  CeRhIn5; short  range  magnetic interaction  and  non  fermi  liquid  behavior, B.E. Light, Ravhi S. Kumar, Andrew Cornelius, P.G Pagliuso  and  L. Sarrao , APS March meeting, Montreal, Canada, 2004
  62. Structural studies of La2-2xSr1+2xMn2O7 bilayer manganite under pressure, Ravhi S. Kumar, Yongrong Shen, D. Prabhakaran, Andrew Cornelius and Andrew Boothrhoyd, APS March meeting, Montreal, Canada, 2004
  63. Raman and x-ray measurements on cyclohexane up to 40 GPa, Michael Pravica, Yongrong Shen, Ravhi S. Kumar, Wayne Stanberry and Malcolm F. Nicol, APS March meeting, Montreal, Canada, 2004
  64. Anisotropic elastic properties of CeRhIn5, Ravhi S. Kumar, H.Kohlmann, B.E Light, Andrew Cornelius,V.Raghavan, W.Darling  and  J.L Sarrao, APS March meeting, Austin, Texas, USA, 2003
  65. Anisotropic elastic properties of CeRhIn5, Ravhi S. Kumar, H.Kohlmann, B.E Light, Andrew Cornelius, V.Raghavan, W.Darling  and  J.L Sarrao, Gordon Research Conference on High Pressure science, NH, USA, during June 2002
  66. High pressure studies of CuAlSe2 and CuAlTe2 Chalcopyrites, Ravhi S. Kumar, A, Victor Jaya. N and Natarajan. S, Fifth National conference on High Pressure Science and Technology, Anna University, Chennai, India, March 2000
  67. Synthesis, Structure, XPS and high pressure studies on Bi-Sr-Ca-Y-Cu-O and Bi-Pb-Sr-Ca-Cu-O systems, Ravhi S. Kumar, Sekar. A, Victor Jaya. N and Natarajan. S, Fifth National conference on High Pressure Science and Technology, Anna University, Chennai, India, March 2000
  68. High Pressure X-ray Diffraction studies of Y doped Bi2212 superconducting system, Ravhi S. Kumar, A. Sekar, N. Victor Jaya and S. Natarajan, National Seminar on Recent Advanced Methods in Molecular Structure Coimbatore, India, 2000
  69. High pressure studies of vanadium doped Bi-2212, Ravhi S. Kumar, Sekar. A, Victor Jaya. N and Natarajan. S, IUCR Conference, Glascow, Scotland, U K, Aug.1999
  70. High pressure x-ray diffraction studies of beta GeSe2, Ravhi S. Kumar, Sekar. A, Victor Jaya. N and Natarajan. S, AIRAPT  – 99, International conference on High pressure science and Technology held at University of Hawaii, Hawaii, U S A, June 1999
  71. High pressure structural studies of PbWO4, Anbukumaran. K, Venkateswaran. C, Ravhi S. Kumar, Victor Jaya. N and Natarajan. S, AIRAPT – 99, International conference on High pressure science and Technology held at University of Hawaii, Hawaii, USA, June 1999
  72. High pressure resistivity studies of Nd-Ba-Cu-O system, Sekar. A, Ravhi S. Kumar, Victor Jaya.N and Natarajan. S, AIRAPT – 99, International conference on High pressure science and Technology held at University of Hawaii, Hawaii, USA, June 1999
  73. Synthesis and high pressure resistivity studies on AgBiSe2, Victor Jaya. N, Subashini. R, Ravhi S. Kumar, Sekar. A, Anbukumaran.N and Natarajan S, AIRAPT – 99, International conference on High pressure science and Technology held at University of Hawaii, Hawaii, USA, June 1999
  74. High pressure x-ray diffraction studies of rare earth doped Bi 2212 high temperature superconductor, Ravhi S. Kumar, Sekar. A, Victor Jaya. N and Natarajan. S, Miami High Tc Conference, USA, Jan 1999
  75. Simple pneumatic pressure attachment for Mao-Bell and NBS type Diamond Anvil Cells for High Pressure X-ray Diffraction Studies, Ravhi S. Kumar, A. Sekar, N. V. Jaya and S. Natarajan, 3rd CCCM International Conference, Turin, Italy, Jan 1999
  76. High pressure resistivity studies on Y doped Bi-2212, Ravhi S. Kumar and Natarajan. S, 10th Anniversary HTS workshop on Physics of materials and applications Texas, USA, March 1996
  77. High pressure effect on normal state electrical resistivity of V doped Bi2212, Ravhi S. Kumar and Natarajan. S National conference on high-pressure science and Technology, Bilaspur, India, Dec.1995
  78. Normal state electrical resistivity studies on Y doped Bi 2212 at high pressures, Ravhi S. Kumar and Natarajan. S, MRS fall meeting, Boston, USA, Nov.1995
  79. High pressure electrical resistivity studies on Y1-xCaxBa2Cu5Oy Ravhi S. Kumar, Jeyabalan. K and Natarajan. S, National conference on high pressure science and technology, NAL, Bangalore, India Sep.1994
  80. High pressure electrical resistivity studies on Y9Ca0.1Ba2Cu3Oy, Elango.P, Ravhi S. Kumar, Jeyabalan. K and Natarajan. S, MRS Fall meeting, Boston, USA, Nov. 1994
  81. High pressure electrical resistivity studies on NdBaCaCuO7-x, Ravhi S. Kumar, Jeyabalan. K and Natarajan. S, MRS Spring meeting, San Francisco, USA, April 1994
  82. High pressure XRD set up with diamond anvil cell using proportional counting system, Ravhi S. Kumar, Saravanan. V, Ariponnammal. S, Victor Jaya. N and S, National symposium on instrumentation NST, Tirupathi, India, Jan. 1994
  83. A simple high-pressure cell for low temperature studies, Balamurugan. K, Ravhi S. Kumar, Victor Jaya. N and Natarajan S, XXXI Annual meeting of EHPRG, Belfast, August 1993
  84. High pressure electrical resistivity studies of Nickel based alloys, Senthil Selvan. J, Venkateswaran. C, Victor Jaya. N, Ravhi S. Kumar and Natarajan. S, XXXI Annual meeting of EHPRG, Belfast, August 1993
  85. A device to measure thermal conductivity in the range of 10K to 300K, Ravhi S. Kumar, Victor Jaya. N and Natarajan. S, XXII thermal conductivity conference, ASU, U S A, Nov. 1993
  86. Energy dispersive x-ray diffraction – calibration of Ge detector, Ariponnammal. S, Ravhi S. Kumar, Suresh Kumar. P, Trinadh. Ch and Natarajan. S, XIIIV National seminar and microsymposium on the crystallography of superconducting materials, Jammu, India, Oct.1992
  87. EXAFS – A laboratory set up and preliminary studies, Ravhi S. Kumar, Siva kumar. K and Natarajan. S, XIIIV National seminar and microsymposium on the crystallography of superconducting materials, Jammu, India, Oct.1992

 

*Publications prior to 1999 bear my old name S.Ravikumar (affiliation to Anna University, India)