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.

arXiv commentpublished version, 14 pages, 2 figures

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Cited by in corpus (22)

• Superconductivity and Magnetism in Non-centrosymmetric System: Application to CePt_3Si
• Gap structure in noncentrosymmetric superconductors
• Nodal gap structure in the noncentrosymmetric superconductor LaNiC2 from magnetic-penetration-depth measurements
• 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
• Spin fluctuations and superconductivity in noncentrosymmetric heavy fermion systems CeRhSi${}_3$ and CeIrSi${}_3$
• Robustness of unconventional $s$-wave superconducting states against disorder
• Unusual behaviours and Impurity Effects in the Noncentrosymmetric Superconductor CePt3Si
• Signatures of triplet correlations in density of states of Ising superconductors
• Pair breaking by nonmagnetic impurities in the noncentrosymmetric superconductor CePt3Si
• Nature and symmetry of the order parameter of the noncentrosymmetric superconductor Li2Pt3B
• General theory of robustness against disorder in multi-band superconductors
• Effects of impurities on Hc2(T) in superconductors without inversion symmetry
• Non-Centrosymmetric Heavy-Fermion Superconductors
• Ginzburg-Landau theory of noncentrosymmetric superconductors
• Observation of multigap and coherence peak in the noncentrosymmetric superconductor CaPtAs: ${}^{75}$As nuclear quadrupole resonance measurement
• Impurity Effect on the Local Density of States around a Vortex in Noncentrosymmetric Superconductors
• Influence on superconductivity in the parity mixing superconductor Li2T3B(T:Pt,Pd) by non-magnetic impurity and defect doping