Superconductivity in non-centrosymmetric LaNiC2

作者：Mukherjee Soumya P^*; Curnoe Stephanie H

来源：Physica C-Superconductivity and Its Applications, 2014, 499: 6-8.

DOI：10.1016/j.physc.2014.01.008

• Inversion-symmetry breaking
• Time-reversal symmetry breaking
• Superconductivity
• Order parameter

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 C-2v 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.

• 出版日期2014-4