High pressure driven superconducting critical temperature tuning in Sb2Se3 topological insulator
2016 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 108, no 21, 212601Article in journal (Refereed) PublishedText
In this letter, we are reporting the change of superconducting critical temperature in Sb2Se3 topological insulator under the influence of an external hydrostatic pressure based on first principles electronic structure calculations coupled with Migdal-Eliashberg model. Experimentally, it was shown previously that Sb2Se3 was undergoing through a transition to a superconducting phase when subjected to a compressive pressure. Our results show that the critical temperature increases up to 6.15K under the pressure unto 40GPa and, subsequently, drops down until 70 GPa. Throughout this pressure range, the system is preserving the initial Pnma symmetry without any structural transformation. Our results suggest that the possible relevant mechanism behind the superconductivity in Sb2Se3 is primarily the electron-phonon coupling. Published by AIP Publishing.
Place, publisher, year, edition, pages
2016. Vol. 108, no 21, 212601
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:uu:diva-298900DOI: 10.1063/1.4950716ISI: 000377024400033OAI: oai:DiVA.org:uu-298900DiVA: diva2:948514
FunderCarl Tryggers foundation Swedish Research CouncilSwedish Energy AgencySwedish National Infrastructure for Computing (SNIC)