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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

Smylie, M. P., Willa, K., Ryan, K., Claus, H., Kwok, W. -K., Qiu, Y., Hor, Y. S., and Welp, U.. An increase in Tc under hydrostatic pressure in the superconducting doped topological insulator Nb0.25Bi2Se3. United States: N. p., Web. doi:10.1016/j.physc.2017.10.010.
Smylie, M. P., Willa, K., Ryan, K., Claus, H., Kwok, W. -K., Qiu, Y., Hor, Y. S., & Welp, U.. An increase in Tc under hydrostatic pressure in the superconducting doped topological insulator Nb0.25Bi2Se3. United States. doi:10.1016/j.physc.2017.10.010.
Smylie, M. P., Willa, K., Ryan, K., Claus, H., Kwok, W. -K., Qiu, Y., Hor, Y. S., and Welp, U.. 2017. "An increase in Tc under hydrostatic pressure in the superconducting doped topological insulator Nb0.25Bi2Se3". United States. doi:10.1016/j.physc.2017.10.010. https://www.osti.gov/servlets/purl/1413746.
@article{osti_1413746,
title = {An increase in Tc under hydrostatic pressure in the superconducting doped topological insulator Nb0.25Bi2Se3},
author = {Smylie, M. P. and Willa, K. and Ryan, K. and Claus, H. and Kwok, W. -K. and Qiu, Y. and Hor, Y. S. and Welp, U.},
abstractNote = {Here, 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.},
doi = {10.1016/j.physc.2017.10.010},
journal = {Physica. C, Superconductivity},
number = C,
volume = 543,
place = {United States},
year = {2017},
month = {10}
}