Odd-frequency Cooper pairs and zero-energy surface bound states in superfluid 3He

S. Higashitani, S. Matsuo, Y. Nagato, K. Nagai, S. Murakawa, R. Nomura, Y. Okuda

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We study the odd-frequency Cooper pairs formed near the surface of superfluid 3He. The odd-frequency pair amplitude is closely related to the local density of states in the low-energy limit. We derive a formula relating explicitly the two quantities. This formula holds for an arbitrary boundary condition at the surface. We also present some numerical results on the surface odd-frequency pair amplitude in superfluid 3He-B. Those analytical and numerical results allow one to interpret the midgap surface density of states, observed recently by transverse acoustic impedance measurements on superfluid 3He-B, as the manifestation of the surface odd-frequency state.

Original languageEnglish
Article number024524
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number2
DOIs
Publication statusPublished - 2012 Jan 12

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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