Strong-Coupling Superconductivity with Mixed Even- and Odd-Frequency Pairing
arXiv:1205.5746 · doi:10.1103/PhysRevB.85.174528
Abstract
We investigate general structure of Landau free energy for stabilizing a novel superconducting state with both even-frequency and odd-frequency components in gap function. On the basis of the Luttinger-Ward functional, we elucidate an emergent mixing between different "parities" in time. The simplest case of the conventional s-wave singlet mixed with the odd-frequency triplet state under broken time-reversal symmetry is examined to demonstrate the anomalous structure of the free-energy functional. The induced odd-frequency component alters behaviors of physical quantities from those obtained by neglecting the odd-frequency component. The novel mixed state may also be relevant to strong-coupling superconductivity coexisting with ferromagnetism.
11 pages, 7 figures
References in corpus (3)
Cited by in corpus (3)
- Odd-frequency superconducting states with different types of Meissner response: Problem of coexistence
- Emergent Odd-Frequency Superconducting Order Parameter near Boundaries in Unconventional Superconductors
- Superconducting pairing symmetry on the extended Hubbard model in the presence of the Rashba-type spin-orbit coupling