Emergent odd-frequency superconducting order parameter near boundaries in unconventional superconductors

Masashige Matsumoto, Mikito Koga, Hiroaki Kusunose

研究成果: Article査読

10 被引用数 (Scopus)

抄録

It was previously suggested that an odd-frequency pair amplitude exists in the vicinity of boundaries in unconventional superconductors. We develop this idea and quest for a novel superconducting order parameter with an odd-frequency dependence. For this purpose, we focus on p-wave superconductors and extend the quasi-classical theory to include the odd-frequency dependence in the order parameter. Both of the frequency and spatial dependences of the order parameter are determined self-consistently. Under a finite electron-phonon interaction, it is found that an odd-frequency order parameter is stabilized near the boundary and coexists with the even-frequency one. By analyzing the induced odd-frequency pair amplitude in terms of the superconducting quasi-particle wavefunction, it is found that the mid-gap bound state generates the emergent odd-frequency order parameter.

本文言語English
論文番号034708
ジャーナルJournal of the Physical Society of Japan
82
3
DOI
出版ステータスPublished - 3 2013

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