Novel sulfur hydrides synthesized at extreme conditions

Funding Agencies|Alexander von Humboldt FoundationAlexander von Humboldt Foundation; Federal Ministry of Education and Research, Germany (BMBF)Federal Ministry of Education & Research (BMBF) [05K19WC1]; Deutsche Forschungsgemeinschaft (DFG)German Research Foundation (DFG) [DU 954-11/1, DU 393-9/2, DU 393-13/1]; DFGGerman Research Foundation (DFG) [DFG FOR2125, WI1232]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009 00971]
The sulfur-hydrogen system is the first one in which superconductivity at temperatures over 200 K has been reported, albeit at high pressure. The particular phases causing the measured T-c and their structures are not yet firmly identified. Here, synchrotron single-crystal x-ray diffraction studies of S-H samples were performed up to 150 GPa and revealed two previously unobserved and unpredicted sulfur-hydrogen phases-H6 +/- xS5 with x similar to 0.4, and H2.85 +/- yS2 with y similar to 0.35. The crystallographic data obtained in this work, both for the new phases and for the previously identified H3S polymorphs, provide an unambiguous experimental proof of the chemical richness of the S-H system and the structural diversity of compounds forming at high pressures and high temperatures. Our results have profound implications for the interpretation of the resistance, superconductivity, and other physical properties measurements on the complex S-H system.

Winkler, BjoernGoethe Univ Frankfurt, Germany (författare)
Bykova, ElenaDESY, Germany (författare)
Fedotenko, TimofeyUniv Bayreuth, Germany (författare)
Chariton, StellaUniv Chicago, IL 60637 USA (författare)
Milman, VictorDassault Syst BIOVIA, England (författare)
Bykov, MaximUniv Bayreuth, Germany (författare)
Prakapenka, VitaliUniv Chicago, IL 60637 USA (författare)
Dubrovinsky, LeonidUniv Bayreuth, Germany (författare)
Doubrovinckaia, NataliaLinköpings universitet,Teoretisk Fysik,Tekniska fakulteten,Univ Bayreuth, Germany(Swepub:liu)natdo06 (författare)
Univ Bayreuth, GermanyGoethe Univ Frankfurt, Germany (creator_code:org_t)

Av författaren/redakt...: Laniel, Dominiqu ...; Winkler, Bjoern; Bykova, Elena; Fedotenko, Timof ...; Chariton, Stella; Milman, Victor; visa fler...; Bykov, Maxim; Prakapenka, Vita ...; Dubrovinsky, Leo ...; Doubrovinckaia, ...; visa färre...

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