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SUMMARY:Novel Phases of Elemental Sulfur under Extreme Compression - Jack 
 Whaley-Baldwin\, University of Cambridge
DTSTART:20211108T160000Z
DTEND:20211108T163000Z
UID:TALK162343@talks.cam.ac.uk
CONTACT:Dr Christoph Schran
DESCRIPTION:The group-VI chalcogen sulfur has long been renowned for its s
 tructural diversity in virtually every pressure and temperature regime it 
 has been studied. Here\, I present eight new phases of solid-state element
 al sulfur at multi-megabar pressures\, obtained from an ab-inito random st
 ructure search (AIRSS). These new phases have fascinating structural and e
 lectronic properties\, and range from superconducting with a near-record T
 c among the elements\, to completely non-superconducting with significant 
 charge localisation. Amongst the newly discovered structures is an incomme
 nsurate host-guest (HG) phase of the Barium-IV type\, which lies within ex
 perimentally accessible pressures\, and to which we devote significant dis
 cussion.\n\n\nAssociated Publications:\n\n\n“Superconducting incommensur
 ate host-guest phases in compressed elemental sulfur.”\nJ. Whaley-Baldwi
 n\, Michael Hutcheon and Chris J. Pickard.\nPhys. Rev. B  103\, 214111 (20
 21).\n(arXiv : 2107.04397)\n\n\n“Sulfur at Terapascal Pressures.”\nJ. 
 Whaley-Baldwin and Chris J. Pickard.\n(not yet published)
LOCATION:Dept of Chemistry\, Wolfson Lecture Theatre and Zoom
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