Photo of Hemley, Russell

Russell Hemley

Professor and LAS Distinguished Chair in the Natural Sciences

Chemistry and Physics

Contact

Building & Room:

2142 SES

About

Russell Hemley's research focuses on the high-pressure behavior of materials, particularly Earth and planetary materials; transformations of hydrogen at multimegabar pressures; novel high-pressure compound formation and pressure-induced chemical reactions in molecular systems; synthesis and characterization of new superhard materials, superconductors, and magnetic materials; pressure-induced amorphization; the effects of pressure on amorphous solids; the rational design of new high-pressure materials from first-principles methods; models for Earth and planetary interiors; fabrication of single crystal diamond by chemical vapor deposition; development of high-pressure methods and analytical techniques such as micro-optical spectroscopy, synchrotron infrared spectroscopy, synchrotron x-ray diffraction and spectroscopy, laser heating, magnetic susceptibility, electrical conductivity, and high-pressure cryogenic methods; science issues related to national security.

 

Selected Publications

Rodgers, J. M., R. J. Hemley, and T. Ichiye, Quasiharmonic analysis of protein energy landscapes from pressure-temperature molecular dynamics simulations, Chem. Phys. 147, 125103 (2017).

Miao, M., J. Botana, R. Hoffmann, I. I. Naumov, and R. J. Hemley, Quasimolecules in compressed lithium, Chem. 56, 972-975 (2017).

Vadapoo, R., M. Ahart, M. Somayazulu, N. Holtgrewe, Y. Meng, Z. Konôpková, R. J. Hemley, and R. E. Cohen, Synthesis of a polar ordered oxynitride perovskite, Rev B. 95, 214120 (2017).

Hemawan, K. W. and R. J. Hemley, Microwave plasmas: Single crystal diamond synthesis, in Encyclopedia of Plasma Technology (Taylor and Francis, 2017).

Zha, C. S., H. Liu, J. S. Tse, and R. J. Hemley, Melting and high P-T transitions of hydrogen to 300 GPa, Rev. Lett. 119, 075302 (2017).

Liu, H., I. I. Naumov, R. Hoffmann, N. W. Ashcroft, and R. J. Hemley, Potential high-Tcsuperconducting lanthanum and yttrium hydrides at high pressure,  Natl. Acad. Sci., 114, 6990–6995 (2017).

Geballe, Z. M., H. Liu, A. K. Mishra, M. Ahart, M. Somayazulu, Y. Meng, M. Baldini, and R. J. Hemley, Synthesis and stability of lanthanum superhydrides, Chem. Int. Ed. 57, 688-692 (2018).

Huang, Q., J. M. Rodgers, R. J. Hemley, and T. Ichiye, Quasiharmonic analysis of the energy landscapes of dihydrofolate reductase from piezophiles and mesophiles, Phys. Chem. B 122, 5527–5533 (2018).

Celliers, P. M., M. Millot, S. Brygoo, R. S. McWilliams, D. E. Fratanduono, J. R. Rygg, A. F. Goncharov, P. Loubeyre, J. H. Eggert, J. L. Peterson, N. B. Meezan, S. Le Pape, G. W. Collins, R. Jeanloz, and R. J. Hemley, Insulator-metal transition in dense fluid deuterium, Science 361, 677-682 (2018).

Ahart, M., M. Somayazulu, D. Popov, Y. Xie, X. Long, Z. G. Ye, R. E. Cohen, and R. J. Hemley, Pressure-induced transitions in ferroelectric single-crystal PbZr54Ti0.46O3, Ferroelectrics 535, 106-113 (2019).

Somayazulu, M., M. Ahart, A. K. Mishra, Z. M. Geballe, M. Baldini, Y. Meng, V. V. Struzhkin, and R. J. Hemley, Evidence for superconductivity above 260 K in lanthanum superhydride at megabar pressures, Rev. Lett. 122, 027001 (2019).

Hemley, R. J., M. Ahart, H. Liu, and M. Somayazulu, Road to room-temperature superconductivity: Tc above 260 K in lanthanum superhydride under pressure, Proceedings of the Ramon Areces Symposium, ‘Superconductivity and Pressure: On the Road to Room-Temperature Superconductivity’, Madrid, Spain, May 21-22, 2018, in press.

Education

PhD (1983), Harvard University