Superconductivity in non-centrosymmetric LaNiC2

Abstract

We present a discussion of superconductivity in non-centrosymmetric superconductors with spin-orbit coupling. A general expression for the quasiparticle excitation energy is derived. The superconducting states for the point group C2v are classified by symmetry in the limit of weak spin-orbit coupling. A non-unitary triplet pairing gap function can account for observations of broken time-reversal symmetry and nodes in the superconducting state of LaNiC2; however such a gap function also has a gapless branch and requires vanishing spin-orbit coupling.

8 pages no figures

References in corpus (8)

• Evidence for time-reversal symmetry breaking in the non-centrosymmetric superconductor LaNiC${}_2$
• Physical properties of the noncentrosymmetric superconductor Mg_10Ir_19B_16
• Order parameter in superconductors with non-degenerate bands
• Evidence for two-gap superconductivity in the non-centrosymmetric compound LaNiC${}_2$
• Gap structure in noncentrosymmetric superconductors
• Relativistic analysis of the pairing symmetry of the noncentrosymmetric superconductor LaNiC${}_2$
• Nodal gap structure in the noncentrosymmetric superconductor LaNiC2 from magnetic-penetration-depth measurements
• Mixed-parity superconductivity in centrosymmetric crystals

Cited by in corpus (2)

• Unconventional superconductivity and an ambient-pressure magnetic quantum critical point in single-crystal LaNiC${}_2$
• Two-Gap Time Reversal Symmetry Breaking Superconductivity in Non-Centrosymmetric LaNiC2