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 | |
| Publication status | Published - 2012 Jan 12 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Higashitani, S., Matsuo, S., Nagato, Y., Nagai, K., Murakawa, S., Nomura, R., & Okuda, Y. (2012). Odd-frequency Cooper pairs and zero-energy surface bound states in superfluid 3He. Physical Review B - Condensed Matter and Materials Physics, 85(2), [024524]. https://doi.org/10.1103/PhysRevB.85.024524