Odd-frequency Cooper pairs and zero-energy surface bound states in superfluid 3He
Superconductivity
2012-01-24 v1
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 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.
Keywords
Cite
@article{arxiv.1201.4425,
title = {Odd-frequency Cooper pairs and zero-energy surface bound states in superfluid 3He},
author = {S. Higashitani and S. Matsuo and Y. Nagato and K. Nagai and S. Murakawa and R. Nomura and Y. Okuda},
journal= {arXiv preprint arXiv:1201.4425},
year = {2012}
}
Comments
5 pages, 3 figures, published in Phys. Rev. B 85, 024524 (2012)