An Increase in TC under Hydrostatic Pressure in the Superconducting Doped Topological Insulator Nb₀.₂₅Bi₂Se₃
We report a positive hydrostatic pressure derivative of the superconducting transition temperature in the doped topological insulator Nb0.25Bi2Se3 via dc SQUID magnetometry in pressures up to 0.6 GPa. This result is contrary to reports on the homologues CuxBi2Se3 and SrxBi2Se3 where smooth suppression of TC is observed. This difference may be attributable to an electronic structure composed of multiple bands whereas the other materials in the superconducting doped Bi2Se3 family are believed to be single-band.
M. P. Smylie et al., "An Increase in TC under Hydrostatic Pressure in the Superconducting Doped Topological Insulator Nb₀.₂₅Bi₂Se₃," Physica C: Superconductivity and its Applications, vol. 543, pp. 58 - 61, Elsevier B.V., Dec 2017.
The definitive version is available at https://doi.org/10.1016/j.physc.2017.10.010
Keywords and Phrases
Nematic Superconductors; Pressure-Enhanced Superconductivity; Superconducting Topological Insulators; Topological Superconductors
International Standard Serial Number (ISSN)
Article - Journal
© 2017 Elsevier B.V., All rights reserved.
01 Dec 2017