An increase in Tc under hydrostatic pressure in the superconducting doped topological insulator Nb0.25Bi2Se3

Smylie, M. P.; Willa, K.; Ryan, K.; Claus, H.; Kwok, W. -K.; Qiu, Y.; Hor, Y. S.; Welp, U.

doi:10.1016/j.physc.2017.10.010

An increase in Tc under hydrostatic pressure in the superconducting doped topological insulator Nb_0.25Bi₂Se₃

Journal Article · Thu Oct 26 00:00:00 EDT 2017 · Physica. C, Superconductivity

DOI:https://doi.org/10.1016/j.physc.2017.10.010· OSTI ID:1413746

Smylie, M. P. ^[1]; Willa, K. ^[2]; Ryan, K. ^[3]; Claus, H. ^[2]; Kwok, W. -K. ^[2]; Qiu, Y. ^[4]; Hor, Y. S. ^[4]; Welp, U. ^[2]

Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Univ. of Notre Dame, IN (United States). Department of Physics
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
University of Illinois at Urbana-Champaign, Urbana, IL (United States). Department of Physics
Missouri University of Science and Technology, Rolla, MO (United States). Department of Physics

Here, we report a positive hydrostatic pressure derivative of the superconducting transition temperature in the doped topological insulator Nb_0.25Bi₂Se₃ via dc SQUID magnetometry in pressures up to 0.6 GPa. This result is contrary to reports on the homologues Cu_xBi₂Se₃ and Sr_xBi₂Se₃ 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 Bi₂Se₃ family are believed to be single-band.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1413746

Alternate ID(s):: OSTI ID: 22801821
OSTI ID: 1496329

Journal Information:: Physica. C, Superconductivity, Journal Name: Physica. C, Superconductivity Journal Issue: C Vol. 543; ISSN 0921-4534

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Nematic superconductors
Pressure-enhanced superconductivity
Superconducting topological insulators
Topological superconductors