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This content will become publicly available on October 26, 2018

Title: An increase in Tc under hydrostatic pressure in the superconducting doped topological insulator Nb 0.25Bi 2Se 3

Here, we report a positive hydrostatic pressure derivative of the superconducting transition temperature in the doped topological insulator Nb 0.25Bi 2Se 3 via dc SQUID magnetometry in pressures up to 0.6 GPa. This result is contrary to reports on the homologues Cu xBi 2Se 3 and Sr xBi 2Se 3 where smooth suppression of T c is observed. This difference may be attributable to an electronic structure composed of multiple bands whereas the other materials in the superconducting doped Bi 2Se 3 family are believed to be single-band.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [2] ;  [4] ;  [4] ;  [2]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Univ. of Notre Dame, IN (United States). Department of Physics
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  3. University of Illinois at Urbana-Champaign, Urbana, IL (United States). Department of Physics
  4. Missouri University of Science and Technology, Rolla, MO (United States). Department of Physics
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Physica. C, Superconductivity
Additional Journal Information:
Journal Volume: 543; Journal Issue: C; Journal ID: ISSN 0921-4534
Publisher:
Elsevier
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; Nematic superconductors; Pressure-enhanced superconductivity; Superconducting topological insulators; Topological superconductors
OSTI Identifier:
1413746