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

doi:10.1103/PhysRevB.85.024524

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

28 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 language	English
Article number	024524
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	85
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.85.024524
Publication status	Published - 2012 Jan 12

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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AU - Higashitani, S.

AU - Matsuo, S.

AU - Nagato, Y.

AU - Nagai, K.

AU - Murakawa, S.

AU - Nomura, R.

AU - Okuda, Y.

PY - 2012/1/12

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