High-pressure study of the basal-plane anisotropy of the upper critical field of the topological superconductor SrxBi2Se3

A. M. Nikitin, Y. Pan, Y. K. Huang, T. Naka, and A. de Visser
Phys. Rev. B 94, 144516 – Published 24 October 2016

Abstract

We report a high-pressure transport study of the upper-critical field Bc2(T) of the topological superconductor Sr0.15Bi2Se3 (Tc=3.0 K). Bc2(T) was measured for magnetic fields directed along two orthogonal directions, a and a*, in the trigonal basal plane. While superconductivity is rapidly suppressed at the critical pressure pc3.5 GPa, the pronounced two-fold basal-plane anisotropy Bc2a/Bc2a*=3.2 at T=0.3 K, recently reported at ambient pressure [Pan et al., Sci. Rep. 6, 28632 (2016)], is reinforced and attains a value of 5 at the highest pressure (2.2 GPa). The data reveal that the unconventional superconducting state with broken rotational symmetry is robust under pressure.

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  • Received 12 September 2016

DOI:https://doi.org/10.1103/PhysRevB.94.144516

©2016 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

A. M. Nikitin1,*, Y. Pan1, Y. K. Huang1, T. Naka2, and A. de Visser1,†

  • 1Van der Waals - Zeeman Institute, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
  • 2National Institute for Materials Science, Sengen 1-2-1, Tsukuba, Ibaraki 305-0047, Japan

  • *a.nikitin@uva.nl
  • a.devisser@uva.nl

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Issue

Vol. 94, Iss. 14 — 1 October 2016

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