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

Kogan, V. G.; Prozorov, R.; Koshelev, A. E.

doi:10.1103/PhysRevB.100.014518

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

Abstract

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

Authors:

Kogan, V. G. ^[1]; Prozorov, R. ^[1]; Koshelev, A. E. ^[2]

Ames Lab. and Iowa State Univ., Ames, IA (United States)
Argonne National Lab. (ANL), Lemont, IL (United States)

Publication Date:: Thu Jul 25 00:00:00 EDT 2019

Research Org.:: Ames Lab., 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)

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.

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                    Kogan, V. G., Prozorov, R., & Koshelev, A. E. Temperature-dependent anisotropies of upper critical field and London penetration depth.  United States.  https://doi.org/10.1103/PhysRevB.100.014518

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                    Kogan, V. G., Prozorov, R., and Koshelev, A. E. Thu .  
"Temperature-dependent anisotropies of upper critical field and London penetration depth".  United States.  https://doi.org/10.1103/PhysRevB.100.014518.  https://www.osti.gov/servlets/purl/1556096.

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@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 = {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},

  doi          = {10.1103/PhysRevB.100.014518},

  journal      = {Physical Review B},

  number       = 1,

  volume       = 100,

  place        = {United States},

  year         = {Thu Jul 25 00:00:00 EDT 2019},

  month        = {Thu Jul 25 00:00:00 EDT 2019}

}

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https://doi.org/10.1103/PhysRevB.100.014518

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Cited by: 6 works

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Figures / Tables:

FIG. 1: The upper panel: d-wave anisotropies γ vs. ellipticity ϵ. The red curve is γ(T_c) = γ_λ(0) = 1/ $\sqrt{ϵ}$ . The blue curves are γ_H(0, φ₀) for the in-plane H_c2,y parallel to the direction of the order-parameter maximum (φ₀ = 0) shown as dashed line, and parallel tomore »

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Works referenced in this record:

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Miranović, Predrag; Machida, Kazushige; G. Kogan, Vladimir
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Magnesium diboride: basic physical properties and high upper critical field anisotropy
journal, October 2002

Bud’ko, S. L.; Canfield, P. C.; Kogan, V. G.
Physica C: Superconductivity, Vol. 382, Issue 1
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Title: Temperature-dependent anisotropies of upper critical field and London penetration depth

Abstract

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