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High pressure driven superconducting critical temperature tuning in Sb2Se3 topological insulator
Univ Fed Santa Maria, Dept Fis, BR-97105900 Santa Maria, RS, Brazil.;Fac Meridional, Escola Engn Civil, BR-99070220 Passo Fundo, RS, Brazil..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Univ Fed Santa Maria, Dept Fis, BR-97105900 Santa Maria, RS, Brazil..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Royal Inst Technol KTH, Dept Mat & Engn, Appl Mat Phys, S-10044 Stockholm, Sweden..
2016 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 108, no 21, 212601Article in journal (Refereed) PublishedText
Abstract [en]

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
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-298900DOI: 10.1063/1.4950716ISI: 000377024400033OAI: oai:DiVA.org:uu-298900DiVA: diva2:948514
Funder
Carl Tryggers foundation Swedish Research CouncilSwedish Energy AgencySwedish National Infrastructure for Computing (SNIC)
Available from: 2016-07-12 Created: 2016-07-12 Last updated: 2016-07-12Bibliographically approved

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Chakraborty, SudipAhuja, Rajeev
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