Effects of Impurities in Non-centrosymmetric Superconductors

  • K. V. SamokhinEmail author
Part of the Lecture Notes in Physics book series (LNP, volume 847)


Effects of disorder on superconducting properties of noncentrosymmetric compounds are discussed. Elastic impurity scattering, even for scalar impurities, leads to a strongly anisotropic mixing of the electron states in the bands split by the spin-orbit coupling. We focus on the calculation of the critical temperature \(T_c,\) the upper critical field \(H_{c2},\) and the spin susceptibility \(\chi_{ij}.\) It is shown that the impurity effects on the critical temperature are similar to those in multi-band centrosymmetric superconductors. In particular, Anderson’s theorem holds for isotropic singlet pairing. In contrast, scalar impurities affect the spin susceptibility in the same way as spin-orbit impurities do in centrosymmetric superconductors. Another peculiar feature is that in the absence of inversion symmetry scalar disorder can mix singlet and triplet pairing channels. This leads to significant deviations of the upper critical field from the predictions of the Werthamer-Helfand-Hohenberg theory in the conventional centrosymmetric case.


Critical Temperature Landau Level Spin Susceptibility Order Parameter Component Scalar Impurity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The author is grateful to D. Agterberg, I. Bonalde, S. Fujimoto, V. Mineev, B. Mitrovic, and M. Sigrist for useful discussions. This work was supported by a Discovery Grant from the Natural Sciences and Engineering Research Council of Canada.


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© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Department of PhysicsBrock UniversityOntarioCanadae-mail:

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