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Title: Nonmonotonic pressure evolution of the upper critical field in superconducting FeSe

Abstract

The pressure dependence of the upper critical field, H c2,c, of single crystalline FeSe was studied using measurements of the interplane resistivity, ρ c, in magnetic fields parallel to tetragonal c axis. H c2,c(T) curves obtained under hydrostatic pressures up to 1.56 GPa, the range over which the superconducting transition temperature, T c, of FeSe exhibits a nonmonotonic dependence with local maximum at p 1 ≈ 0.8 GPa and local minimum at p 2 ≈ 1.2 GPa. The slope of the upper critical field at T c,(dH c2,c/dT)T c, also exhibits a nonmonotonic pressure dependence with distinct changes at p 1 and p 2. For p < p 1 the slope can be described within a multiband orbital model. For both p 1 < p < p 2 and p > p 2 the slope is in good semiquantitative agreement with a single band, orbital Helfand-Werthamer theory with Fermi velocities determined from Shubnikov–de Haas measurements. Lastly, this finding indicates that Fermi surface changes are responsible for the local minimum of T c(p) at p 2 ≈ 1.2 GPa.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1240742
Alternate Identifier(s):
OSTI ID: 1236530
Report Number(s):
IS-J-8850
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 6; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Kaluarachchi, Udhara S., Taufour, Valentin, Böhmer, Anna E., Tanatar, Makariy A., Bud'ko, Sergey L., Kogan, Vladimir G., Prozorov, Ruslan, and Canfield, Paul C. Nonmonotonic pressure evolution of the upper critical field in superconducting FeSe. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.064503.
Kaluarachchi, Udhara S., Taufour, Valentin, Böhmer, Anna E., Tanatar, Makariy A., Bud'ko, Sergey L., Kogan, Vladimir G., Prozorov, Ruslan, & Canfield, Paul C. Nonmonotonic pressure evolution of the upper critical field in superconducting FeSe. United States. doi:10.1103/PhysRevB.93.064503.
Kaluarachchi, Udhara S., Taufour, Valentin, Böhmer, Anna E., Tanatar, Makariy A., Bud'ko, Sergey L., Kogan, Vladimir G., Prozorov, Ruslan, and Canfield, Paul C. Mon . "Nonmonotonic pressure evolution of the upper critical field in superconducting FeSe". United States. doi:10.1103/PhysRevB.93.064503. https://www.osti.gov/servlets/purl/1240742.
@article{osti_1240742,
title = {Nonmonotonic pressure evolution of the upper critical field in superconducting FeSe},
author = {Kaluarachchi, Udhara S. and Taufour, Valentin and Böhmer, Anna E. and Tanatar, Makariy A. and Bud'ko, Sergey L. and Kogan, Vladimir G. and Prozorov, Ruslan and Canfield, Paul C.},
abstractNote = {The pressure dependence of the upper critical field, Hc2,c, of single crystalline FeSe was studied using measurements of the interplane resistivity, ρc, in magnetic fields parallel to tetragonal c axis. Hc2,c(T) curves obtained under hydrostatic pressures up to 1.56 GPa, the range over which the superconducting transition temperature, Tc, of FeSe exhibits a nonmonotonic dependence with local maximum at p1 ≈ 0.8 GPa and local minimum at p2 ≈ 1.2 GPa. The slope of the upper critical field at Tc,(dHc2,c/dT)Tc, also exhibits a nonmonotonic pressure dependence with distinct changes at p1 and p2. For p < p1 the slope can be described within a multiband orbital model. For both p1 < p < p2 and p > p2 the slope is in good semiquantitative agreement with a single band, orbital Helfand-Werthamer theory with Fermi velocities determined from Shubnikov–de Haas measurements. Lastly, this finding indicates that Fermi surface changes are responsible for the local minimum of Tc(p) at p2 ≈ 1.2 GPa.},
doi = {10.1103/PhysRevB.93.064503},
journal = {Physical Review B},
number = 6,
volume = 93,
place = {United States},
year = {2016},
month = {2}
}

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Cited by: 14 works
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    Works referencing / citing this record:

    Discovery of orbital-selective Cooper pairing in FeSe
    journal, July 2017