Robustness of spin-triplet pairing and the singlet-triplet pairing crossover in superconductor/ferromagnet hybrids

Shiro Kawabata, Yasuhiro Asano, Yukio Tanaka, Alexandre Avraamovitch Golubov

Research output: Contribution to journalArticleAcademicpeer-review

24 Citations (Scopus)

Abstract

We have investigated the proximity effect in superconductor/ferromagnet junctions in a systematic manner to discuss the relationship between the zero-energy peak (ZEP) of the local density of states (LDOS) and spin-triplet odd-frequency pairing. By exactly solving the nonlinear Usadel equations, we have found that the ZEP is realized in a wide range of geometrical and material parameters in the case of the noncollinear magnetization. This strongly suggests the robustness of the ZEP induced by spin-triplet odd-frequency pairing in such systems. We also found that the crossover from singlet pairing to triplet pairing can be detected by measuring the F layer thickness dependence of the ZEP height. Furthermore, we show how to observe signatures of spin-triplet odd-frequency pairing and the pairing crossover by LDOS measurement. Our results provide a direct way to experimentally detect signatures of the odd-frequency pairing state.
Original languageUndefined
Article number124702
Pages (from-to)124702-1-124702-9
JournalJournal of the Physical Society of Japan
Volume82
Issue number12
DOIs
Publication statusPublished - 2013

Keywords

  • METIS-301725
  • IR-88971

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