Effects of impurities on superconductivity in noncentrosymmetric compounds

Abstract

We microscopically derive the Ginzburg-Landau free energy functional for a noncentrosymmetric superconductor with a large spin-orbit splitting of the electron bands, in the presence of nonmagnetic impurities. The critical temperature is found to be suppressed by disorder, both for conventional and unconventional pairing, in the latter case according to the universal Abrikosov-Gor'kov function. The impurity effect on the upper critical field turns out to be nonuniversal, determined by the pairing symmetry and the band structure. In a BCS-like model, Tc is not affected, while Hc2 increases with disorder. For unconventional pairing, both Tc and Hc2 are suppressed by disorder.

published version, 14 pages, 2 figures

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Cited by in corpus (14)

• Superconductivity and Magnetism in Non-centrosymmetric System: Application to CePt_3Si
• Gap structure in noncentrosymmetric superconductors
• Magnetic Properties in Non-centrosymmetric Superconductors with and without Antiferromagnetic Order
• On the spin susceptibility of noncentrosymmetric superconductors
• Proximity effect with noncentrosymmetric superconductors
• Upper critical field in noncentrosymmetric superconductors
• Fractional flux quanta at intrinsic metallic interfaces of noncentrosymmetric superconductors
• Impurity resonance states in noncentrosymmetric superconductor $CeP{t}_{3}Si$: a probe for Cooper-pairing symmetry
• Signatures of triplet correlations in density of states of Ising superconductors
• Pair breaking by nonmagnetic impurities in the noncentrosymmetric superconductor CePt3Si
• General theory of robustness against disorder in multi-band superconductors
• Effects of impurities on Hc2(T) in superconductors without inversion symmetry
• Ginzburg-Landau theory of noncentrosymmetric superconductors
• Observation of multigap and coherence peak in the noncentrosymmetric superconductor CaPtAs: ${}^{75}$As nuclear quadrupole resonance measurement