Assumed Peierls transition in NbS₃ under pressure

Abstract

The effect of pressure on the conduction of the NbS3 quasi‐one‐dimensional conductor is studied. A pressure induced insulator–metal transition is observed. The transition is accompanied by an increase in conductivity by six orders of magnitude at room temperature and the sign of thermal coefficient of resistance changes at pressure of about 5 GPa. An additional stepdown‐like feature appears in the temperature dependences of resistance that is interpreted as a Peierls transition. The transition temperature TP depends on pressure as TP [K] = 7.5P [GPa] + 202. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Emergence of high superconductivity in a layered TaS3 crystal

“…16 As is well known, high pressure can effectively modify chemical bonding and lead to the emergence of different stoichiometries that may exist in totally counterintuitive chemical regimes. [17][18][19][20][21] It is thus highly desirable to explore Ta-S compounds stable under high pressure and reveal the intrinsic mechanisms associated with high superconductivity.…”