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Title: Temperature-dependent anisotropies of upper critical field and London penetration depth

Journal Article · · Physical Review B
 [1];  [1];  [2]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
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We show on a few examples of one-band materials with spheroidal Fermi surfaces and anisotropic order parameters that anisotropies γH of the upper critical field and γλ of the London penetration depth depend on temperature, a feature commonly attributed to multiband superconductors. The parameters γH and γλ may have opposite temperature dependences or may change in the same direction depending on the Fermi-surface shape and on the character of the gap nodes. For two-band systems, the behavior of anisotropies is affected by the ratios of bands densities of states, Fermi velocities, anisotropies, and order parameters. We investigate in detail the conditions determining the directions of temperature dependences of the two anisotropy factors

Research Organization:
Ames Lab., Ames, IA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-07CH11358; AC02-06CH11357
OSTI ID:
1556096
Alternate ID(s):
OSTI ID: 1545441; OSTI ID: 1557244
Report Number(s):
IS-J-9996; PRBMDO
Journal Information:
Physical Review B, Vol. 100, Issue 1; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

References (17)

Anisotropic thermodynamic and transport properties of single-crystalline CaKFe 4 As 4 journal August 2016
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Upper critical fields of superconductors with anisotropic fermi surfaces journal April 1990
Orbital upper critical field and its anisotropy of clean one- and two-band superconductors journal October 2012
Anisotropy of the Upper Critical Field in Superconductors with Anisotropic Gaps: Anisotropy Parameters of MgB 2 journal February 2003
Pauli-limiting effects in the upper critical fields of a clean LiFeAs single crystal journal September 2011
Fermi Surface Topology and the Upper Critical Field in Two-Band Superconductors: Application to M g B 2 journal July 2003
Macroscopic anisotropy in superconductors with anisotropic gaps journal July 2002
Temperature and Purity Dependence of the Superconducting Critical Field, H c 2 . II journal July 1966
Temperature and Field Dependence of the Anisotropy of MgB 2 journal April 2002
Two-band effects in the angular dependence of H c 2 of MgB 2 single crystals journal October 2004
Magnesium diboride: basic physical properties and high upper critical field anisotropy journal October 2002
Nearly isotropic superconductivity in (Ba,K)Fe2As2 journal January 2009
Anisotropy of the upper critical field and critical current in single crystal MgB 2 journal November 2002
London penetration depth in iron-based superconductors journal September 2011
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Figures / Tables (5)

FIG. 1(p. 3)figure FIG. 1
FIG. 2(p. 4)figure FIG. 2
FIG. 3(p. 4)figure FIG. 3
FIG. 4(p. 5)figure FIG. 4
FIG. 5(p. 6)figure FIG. 5

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY