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Pair breaking in superconductors with strong spin-orbit coupling

Journal Article · · Physical Review. B
 [1];  [2];  [3]
  1. University of Otago, Dunedin (New Zealand); OSTI
  2. Univ. of Wisconsin, Milwaukee, WI (United States)
  3. University of Otago, Dunedin (New Zealand)
+ Show Author Affiliations
Here we study the influence of symmetry-breaking perturbations on superconductivity in multiorbital materials, with a particular focus on an external magnetic field. We introduce the field-fitness function which characterizes the pair-breaking effects of the perturbation on a given superconducting state. For even-parity superconductors we find that this field-fitness function for an external magnetic field is one, implying that the paramagnetic response is controlled only by a generalized effective g factor. For odd-parity superconductors, the interplay of the effective g factor and the field-fitness function can lead to counterintuitive results. We demonstrate this for p-wave pairing in the effective j = $$\frac{3}{2}$$ electronic states of the Luttinger-Kohn model.
Research Organization:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
Grant/Contract Number:
SC0021971
OSTI ID:
2421980
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 6 Vol. 107; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY