Temperature dependence of London penetration depth anisotropy in superconductors with anisotropic order parameters
Abstract
Here, we study the effects of anisotropic order parameters on the temperature dependence of London penetration depth anisotropy . After , this dependence is commonly attributed to distinct gaps on multiband Fermi surfaces in superconductors. We have found, however, that the anisotropy parameter may depend on temperature also in one-band materials with anisotropic order parameters ; a few such examples are given. We have also found that for different order parameters, the temperature dependence of can be represented with good accuracy by the interpolation suggested by Einzel, which simplifies considerably the evaluation of . Of particular interest are mixed order parameters of two symmetries for which may go through a maximum for a certain relative weight of two phases. Also, for this case we find that the ratio may exceed substantially the weak-coupling limit of 1.76. It, however, does not imply strong coupling; rather, it is due to significantly anisotropic angular variation of .
- Authors:
-
- Ames Lab., Ames, IA (United States)
- 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 Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1769023
- Report Number(s):
- IS-J-10,421
Journal ID: ISSN 2469-9950; TRN: US2206686
- Grant/Contract Number:
- AC02-07CH11358
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review. B
- Additional Journal Information:
- Journal Volume: 103; Journal Issue: 5; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Kogan, V. G., and Prozorov, R. Temperature dependence of London penetration depth anisotropy in superconductors with anisotropic order parameters. United States: N. p., 2021.
Web. doi:10.1103/physrevb.103.054502.
Kogan, V. G., & Prozorov, R. Temperature dependence of London penetration depth anisotropy in superconductors with anisotropic order parameters. United States. https://doi.org/10.1103/physrevb.103.054502
Kogan, V. G., and Prozorov, R. 2021.
"Temperature dependence of London penetration depth anisotropy in superconductors with anisotropic order parameters". United States. https://doi.org/10.1103/physrevb.103.054502. https://www.osti.gov/servlets/purl/1769023.
@article{osti_1769023,
title = {Temperature dependence of London penetration depth anisotropy in superconductors with anisotropic order parameters},
author = {Kogan, V. G. and Prozorov, R.},
abstractNote = {Here, we study the effects of anisotropic order parameters on the temperature dependence of London penetration depth anisotropy γλ(T). After MgB2, this dependence is commonly attributed to distinct gaps on multiband Fermi surfaces in superconductors. We have found, however, that the anisotropy parameter may depend on temperature also in one-band materials with anisotropic order parameters Δ(T,kF); a few such examples are given. We have also found that for different order parameters, the temperature dependence of Δ(T)/Δ(0) can be represented with good accuracy by the interpolation suggested by Einzel, which simplifies considerably the evaluation of γλ(T). Of particular interest are mixed order parameters of two symmetries for which γλ(T) may go through a maximum for a certain relative weight of two phases. Also, for this case we find that the ratio Δmax(0)/Tc may exceed substantially the weak-coupling limit of 1.76. It, however, does not imply strong coupling; rather, it is due to significantly anisotropic angular variation of Δ.},
doi = {10.1103/physrevb.103.054502},
url = {https://www.osti.gov/biblio/1769023},
journal = {Physical Review. B},
issn = {2469-9950},
number = 5,
volume = 103,
place = {United States},
year = {Fri Feb 05 00:00:00 EST 2021},
month = {Fri Feb 05 00:00:00 EST 2021}
}
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