TY - JOUR
T1 - Odd-frequency Cooper pairs and zero-energy surface bound states in superfluid 3He
AU - Higashitani, S.
AU - Matsuo, S.
AU - Nagato, Y.
AU - Nagai, K.
AU - Murakawa, S.
AU - Nomura, R.
AU - Okuda, Y.
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/1/12
Y1 - 2012/1/12
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.85.024524
DO - 10.1103/PhysRevB.85.024524
M3 - Article
AN - SCOPUS:84856485981
VL - 85
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 2
M1 - 024524
ER -