Broadening of the surface Andreev bound states band of superfluid 3He-B on a partially specular wall

Yuichiro Wada; Satoshi Murakawa; Yuta Tamura; Masamichi Saitoh; Yuki Aoki; Ryuji Nomura; Yuichi Okuda

doi:10.1103/PhysRevB.78.214516

Broadening of the surface Andreev bound states band of superfluid ³He-B on a partially specular wall

Yuichiro Wada, Satoshi Murakawa, Yuta Tamura, Masamichi Saitoh, Yuki Aoki, Ryuji Nomura, Yuichi Okuda

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

A measurement of the surface Andreev bound states of the superfluid ³He-B phase under different boundary conditions is presented. Transverse-acoustic impedance spectroscopy was used to determine the bandwidth of the bound states on a wall with various specularities. It was found that the band was broader for larger specularity and filled up the superfluid gap above a critical specularity. Specularity was controlled by coating the wall with thin layers of ⁴H e and was evaluated separately using acoustic impedance measurement in the normal-fluid phase.

Original language	English
Article number	214516
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	78
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.78.214516
Publication status	Published - 2008 Dec 1
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.78.214516

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AU - Wada, Yuichiro

AU - Murakawa, Satoshi

AU - Tamura, Yuta

AU - Saitoh, Masamichi

AU - Aoki, Yuki

AU - Nomura, Ryuji

AU - Okuda, Yuichi

PY - 2008/12/1

Y1 - 2008/12/1

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AB - A measurement of the surface Andreev bound states of the superfluid 3He-B phase under different boundary conditions is presented. Transverse-acoustic impedance spectroscopy was used to determine the bandwidth of the bound states on a wall with various specularities. It was found that the band was broader for larger specularity and filled up the superfluid gap above a critical specularity. Specularity was controlled by coating the wall with thin layers of 4H e and was evaluated separately using acoustic impedance measurement in the normal-fluid phase.

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Broadening of the surface Andreev bound states band of superfluid ³He-B on a partially specular wall

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