Abstract
In the theory of dilute magnetic impurities in superconductors, the effect of all impurity spin-components is expressed via a single magnetic scattering rate Γ m. In a more realistic setting, magnetic impurities are anisotropic. In this case, the spatial randomness of three spin-components of impurities gives rise to generally different scattering rates Γ i (i = 1, 2, 3). We explore the effects of anisotropic magnetic impurities on the in-plane critical field in 2D superconductors. We discuss singlet, triplet, and parity-mixed order parameters allowed in systems without the inversion center. Also, the addition of a small amount of magnetic impurities may cause singlet to triplet crossovers. In all cases, different components of impurity spin affect the magnetic field - temperature phase diagram differently. We show that anisotropy of the magnetic impurities can serve as a probe of unconventional triplet or parity-mixed superconductivity.
Original language | American English |
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Article number | 053903 |
Journal | Journal of Applied Physics |
Volume | 128 |
Issue number | 5 |
DOIs | |
State | Published - 7 Aug 2020 |
Bibliographical note
Funding Information:D.M. acknowledges the support from the Swiss National Science Foundation, Project No. 184050, and the authors acknowledge the support from the Israel Science Foundation, Grant No. 1287/15.
Publisher Copyright:
© 2020 Author(s).