78 citations · 295 across the 14 of their papers we have counts for
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Revisiting the surface density of states of midgap Andreev edge states
Gota Sato, Yasushi Nagato, Seiji Higashitani
We revisit the effect of surface roughness on midgap Andreev edge states (MAES) in p- and d- wave superconductors. For a perfectly specular surface, MAES form a flat band at the Fe…
Lifetime of edge modes at rough surfaces of chiral superconductors
Seiji Higashitani, Gota Sato, Yasushi Nagato
We study the effect of diffuse surface scattering on the edge modes in two-dimensional chiral superconductors with time-reversal symmetry-breaking Cooper pairs, each carrying angul…
Influence of diffuse surface scattering on the stability of superconducting phases with spontaneous surface current generated by Andreev bound states
Nobumi Miyawaki, Seiji Higashitani
We report a theoretical study on the phase transition between superconducting states with and without spontaneous surface current. The phase transition takes place due to the forma…
Subgap in the surface bound states spectrum of Superfluid He-B with Rough Surface
Yasushi Nagato, Seiji Higashitani, Katsuhiko Nagai
Subgap structure in the surface bound states spectrum of Superfluid He-B with rough surface is discussed. The subgap is formed by the level repulsion between the surface bound…
Fermi surface effect on spontaneous breaking of time-reversal symmetry in unconventional superconducting films
Nobumi Miyawaki, Seiji Higashitani
We propose a mechanism that helps stabilize a superconducting state with broken time-reversal symmetry, which was predicted to realize in a d-wave superconducting film [A. B. Voron…
Odd-frequency pairing effect on the superfluid density and the Pauli spin susceptibility in spatially nonuniform spin-singlet superconductors
S. Higashitani
A theoretical study is presented on the odd-frequency spin-singlet pairing that arises in nonuniform even-frequency superconductors as a consequence of broken translation symmetry.…
Strong Anisotropy in Spin Suceptibility of Superfluid 3He-B Film Caused by Surface Bound States
Yasushi Nagato, Seiji Higashitani, Katsuhiko Nagai
Spin susceptibility of superfluid 3He-B film with specular surfaces is calculated. It is shown that, when the magnetic field is applied in a direction perpendiculr to the film, the…
Proximity effect between a dirty Fermi liquid and superfluid 3He
S. Higashitani, Y. Nagato, K. Nagai
The proximity effect in superfluid He partly filled with high porosity aerogel is discussed. This system can be regarded as a dirty Fermi liquid/spin-triplet p-wave superfluid…
Ultrasound attenuation of superfluid He in aerogel
H. C. Choi, N. Masuhara, B. H. Moon +7
We have performed longitudinal ultrasound (9.5 MHz) attenuation measurements in the B-phase of superfluid He in 98% porosity aerogel down to the zero temperature limit for a wi…
Rough Surface Effect on Meissner Diamagnetism in Normal-layer of N-S Proximity-Contact System
Kotaro Yamada, Seiji Higashitani, Katsuhiko Nagai
Rough surface effect on the Meissner diamagnetic current in the normal layer of proximity contact N-S bi-layer is investigated in the clean limit. The diamagnetic current and the s…