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.

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.

UR - http://www.scopus.com/inward/record.url?scp=84856485981&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84856485981&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.85.024524

DO - 10.1103/PhysRevB.85.024524

M3 - Article

AN - SCOPUS:84856485981

SN - 1098-0121

VL - 85

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 2

M1 - 024524

ER -