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High pressure driven superconducting critical temperature tuning in Sb2Se3 topological insulator
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.
2016 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 108, no 21, 212601Article in journal (Refereed) Published
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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.

Place, publisher, year, edition, pages
2016. Vol. 108, no 21, 212601
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Physical Sciences
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URN: urn:nbn:se:kth:diva-189092DOI: 10.1063/1.4950716ISI: 000377024400033Scopus ID: 2-s2.0-84971216348OAI: oai:DiVA.org:kth-189092DiVA: diva2:943746
Note

QC 20160628

Available from: 2016-06-28 Created: 2016-06-27 Last updated: 2016-06-28Bibliographically approved

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