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

Abstract

In this work, we show on a few examples of one-band materials with spheroidal Fermi surfaces and anisotropic order parameters that anisotropies γ H of the upper critical field and γ λ of the London penetration depth depend on temperature, a feature commonly attributed to multiband superconductors. The parameters γ H and γ λ 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. Lastly, we investigate in detail the conditions determining the directions of temperature dependences of the two anisotropy factors.

Authors:
 [1];  [1];  [2]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States); 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; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1556096
Alternate Identifier(s):
OSTI ID: 1545441; OSTI ID: 1557244
Report Number(s):
IS-J-9996
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
AC02-07CH11358; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 1; 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

Kogan, V. G., Prozorov, R., and Koshelev, A. E. Temperature-dependent anisotropies of upper critical field and London penetration depth. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.014518.
Kogan, V. G., Prozorov, R., & Koshelev, A. E. Temperature-dependent anisotropies of upper critical field and London penetration depth. United States. doi:10.1103/PhysRevB.100.014518.
Kogan, V. G., Prozorov, R., and Koshelev, A. E. Thu . "Temperature-dependent anisotropies of upper critical field and London penetration depth". United States. doi:10.1103/PhysRevB.100.014518.
@article{osti_1556096,
title = {Temperature-dependent anisotropies of upper critical field and London penetration depth},
author = {Kogan, V. G. and Prozorov, R. and Koshelev, A. E.},
abstractNote = {In this work, 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. Lastly, we investigate in detail the conditions determining the directions of temperature dependences of the two anisotropy factors.},
doi = {10.1103/PhysRevB.100.014518},
journal = {Physical Review B},
number = 1,
volume = 100,
place = {United States},
year = {2019},
month = {7}
}

Journal Article:
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