Temperature dependence of London penetration depth anisotropy in superconductors with anisotropic order parameters
- Ames Lab., Ames, IA (United States)
- Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
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 .
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- Grant/Contract Number:
- AC02-07CH11358
- OSTI ID:
- 1769023
- Report Number(s):
- IS-J-10,421; TRN: US2206686
- Journal Information:
- Physical Review. B, Vol. 103, Issue 5; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Magnetic, thermal, and electronic-transport properties of EuMg2Bi2 single crystals
Near-ideal molecule-based Haldane spin chain