Strong-coupling superconductivity with mixed even- and odd-frequency pairing

Hiroaki Kusunose, Masashige Matsumoto, Mikito Koga

研究成果: Article査読

11 被引用数 (Scopus)

抄録

We investigate the general structure of Landau free energy for stabilizing a novel superconducting state with both even-frequency and odd-frequency components in the 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.

本文言語English
論文番号174528
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
85
17
DOI
出版ステータスPublished - 25 5 2012

引用スタイル