Manikandan, K. and -, Shruti and Neha, P. and Selvan, G. Kalai and Wang, B. and Uwatoko, Y. and Ishigaki, K. and Jha, R. and Awana, V. P. S. and Arumugam, S. and Patnaik, S. (2017) Possibility for conventional superconductivity in Sr0.1Bi2Se3 from high-pressure transport studies. EPL (Europhysics Letters), 118 (47008). 47008-P1-47008-P6. ISSN 0295-5075

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SrxBi2Se3 is recently reported to be a superconductor derived from topological insulator Bi2Se3. It shows a maximum resistive T-c of 3.25K at ambient pressure. We report magnetic (up to 1GPa) and transport properties (up to 8Gpa) under pressure for single crystalline Sr0.1Bi2Se3 superconductor. Magnetic measurements show that T-c decreases from similar to 2.6K (0GPa) to similar to 1.9K (0.81GPa). Similar behavior is observed in transport properties as well without much change in the metallic characteristics in normal-state resistivity. No reentrant superconducting phase (Zhou Y. et al., Phys. Rev. B, 93 (2016) 144514) is observed at high pressure. Normal-state resistivity near T-c is explained by Fermi liquid model. Band structure calculations indicate decreasing density of states at Fermi level with pressure. In consonance with transition temperature suppression in conventional BCS low-T-c superconductors, the pressure effect in SrxBi2Se3 is well accounted by pressure-induced band broadening.

Item Type: Article
Additional Information: copyright for this article belongs to M\S Elsevier.
Subjects: Physics
Depositing User: Users 27 not found.
Date Deposited: 07 Dec 2018 08:26
Last Modified: 07 Dec 2018 08:26

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