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CATEGORIES:Lennard-Jones Centre
SUMMARY:Novel Phases of Elemental Sulfur under Extreme Com
 pression - Jack Whaley-Baldwin\, University of Cam
 bridge
DTSTART;TZID=Europe/London:20211108T160000
DTEND;TZID=Europe/London:20211108T163000
UID:TALK162343AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/162343
DESCRIPTION:The group-VI chalcogen sulfur has long been renown
 ed for its structural diversity in virtually every
  pressure and temperature regime it has been studi
 ed. Here\, I present eight new phases of solid-sta
 te elemental sulfur at multi-megabar pressures\, o
 btained from an ab-inito random structure search (
 AIRSS). These new phases have fascinating structur
 al and electronic properties\, and range from supe
 rconducting with a near-record Tc among the elemen
 ts\, to completely non-superconducting with signif
 icant charge localisation. Amongst the newly disco
 vered structures is an incommensurate host-guest (
 HG) phase of the Barium-IV type\, which lies withi
 n experimentally accessible pressures\, and to whi
 ch we devote significant discussion.\n\n\nAssociat
 ed Publications:\n\n\n“Superconducting incommensur
 ate host-guest phases in compressed elemental sulf
 ur.”\nJ. Whaley-Baldwin\, Michael Hutcheon and Chr
 is J. Pickard.\nPhys. Rev. B  103\, 214111 (2021).
 \n(arXiv : 2107.04397)\n\n\n“Sulfur at Terapascal 
 Pressures.”\nJ. Whaley-Baldwin and Chris J. Pickar
 d.\n(not yet published)
LOCATION:Dept of Chemistry\, Wolfson Lecture Theatre and Zo
 om
CONTACT:Dr Christoph Schran
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