Инд. авторы:	Goncharov A.F., Lobanov S.S., Kruglov I., Zhao X.-M., Chen X.-J., Oganov A.R., Konôpková Z., Prakapenka V.B.
Заглавие:	Hydrogen sulfide at high pressure: Change in stoichiometry
Библ. ссылка:	Goncharov A.F., Lobanov S.S., Kruglov I., Zhao X.-M., Chen X.-J., Oganov A.R., Konôpková Z., Prakapenka V.B. Hydrogen sulfide at high pressure: Change in stoichiometry // Physical Review B: Condensed Matter and Materials Physics. - 2016. - Vol.93. - Iss. 17. - Art.174105. - ISSN 1098-0121. - EISSN 1550-235X.
Внешние системы:	DOI: 10.1103/PhysRevB.93.174105; SCOPUS: 2-s2.0-84969135178; WoS: 000375990600002;
Реферат:	eng: Hydrogen sulfide (H2S) was studied by x-ray synchrotron diffraction and Raman spectroscopy up to 150 GPa at 180-295 K and by quantum-mechanical variable-composition evolutionary simulations. The experiments show that H2S becomes unstable with respect to formation of compounds with different structure and composition, including Cccm and a body-centered cubic like (R3m or Im-3m) H3S, the latter one predicted previously to show a record-high superconducting transition temperature, a Tc of 203 K. These experiments provide experimental ground for understanding of this record-high Tc. The experimental results are supported by theoretical structure searches that suggest the stability of H3S, H4S3, H5S8, H3S5, and HS2 compounds that have not been reported previously at elevated pressures. © 2016 American Physical Society.
Издано:	2016
Физ. характеристика:	174105