The surface density of states of superfluid 3He for different surface boundary Conditions

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

doi:10.1007/s10909-007-9527-2

The surface density of states of superfluid ³He for different surface boundary Conditions

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

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

1 Citation (Scopus)

Abstract

We measured the complex transverse acoustic impedance of superfluid ³He in the B phase by coating a surface with ⁴He to study the boundary condition dependence of the surface bound states. Observed features in the temperature dependence were similar to those without ⁴He coating. However, temperatures showing singularities became higher and variations in the dependence became smaller. The small variations indicated that a specular surface was realized by the ⁴He coating. Increase in the singularity temperature indicated that the bandwidth of the surface Andreev bound states became broader by the coating.

Original language	English
Pages (from-to)	154-159
Number of pages	6
Journal	Journal of Low Temperature Physics
Volume	150
Issue number	3-4
DOIs	https://doi.org/10.1007/s10909-007-9527-2
Publication status	Published - 2008 Feb
Externally published	Yes

Keywords

Andreev bound states
Helium-3
Superfluid

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Materials Science(all)
Condensed Matter Physics

Access to Document

10.1007/s10909-007-9527-2

Cite this

@article{7719eb5ec7144560af05158c4e49fc21,

title = "The surface density of states of superfluid 3He for different surface boundary Conditions",

abstract = "We measured the complex transverse acoustic impedance of superfluid 3He in the B phase by coating a surface with 4He to study the boundary condition dependence of the surface bound states. Observed features in the temperature dependence were similar to those without 4He coating. However, temperatures showing singularities became higher and variations in the dependence became smaller. The small variations indicated that a specular surface was realized by the 4He coating. Increase in the singularity temperature indicated that the bandwidth of the surface Andreev bound states became broader by the coating.",

keywords = "Andreev bound states, Helium-3, Superfluid",

author = "Satoshi Murakawa and Yuichiro Wada and Yuta Tamura and Masamichi Saitoh and Yuki Aoki and Ryuji Nomura and Yuichi Okuda",

note = "Funding Information: Acknowledgements We would like to thank C.B. Winkelmann for technical advice on vibrating wire thermometry. We are grateful to H. Ishimoto, A. Yamaguchi and O. Ishikawa for experimental support and to Y. Nagato and K. Nagai for useful discussions. S. M. acknowledges support from the 21st Century COE Program at Tokyo Tech “Nanometer-Scale Quantum Physics” by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. This study was supported in part by a Grant-in-Aid for Scientific Research by MEXT.",

year = "2008",

month = feb,

doi = "10.1007/s10909-007-9527-2",

language = "English",

volume = "150",

pages = "154--159",

journal = "Journal of Low Temperature Physics",

issn = "0022-2291",

publisher = "Springer New York",

number = "3-4",

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TY - JOUR

T1 - The surface density of states of superfluid 3He for different surface boundary Conditions

AU - Murakawa, Satoshi

AU - Wada, Yuichiro

AU - Tamura, Yuta

AU - Saitoh, Masamichi

AU - Aoki, Yuki

AU - Nomura, Ryuji

AU - Okuda, Yuichi

N1 - Funding Information: Acknowledgements We would like to thank C.B. Winkelmann for technical advice on vibrating wire thermometry. We are grateful to H. Ishimoto, A. Yamaguchi and O. Ishikawa for experimental support and to Y. Nagato and K. Nagai for useful discussions. S. M. acknowledges support from the 21st Century COE Program at Tokyo Tech “Nanometer-Scale Quantum Physics” by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. This study was supported in part by a Grant-in-Aid for Scientific Research by MEXT.

PY - 2008/2

Y1 - 2008/2

N2 - We measured the complex transverse acoustic impedance of superfluid 3He in the B phase by coating a surface with 4He to study the boundary condition dependence of the surface bound states. Observed features in the temperature dependence were similar to those without 4He coating. However, temperatures showing singularities became higher and variations in the dependence became smaller. The small variations indicated that a specular surface was realized by the 4He coating. Increase in the singularity temperature indicated that the bandwidth of the surface Andreev bound states became broader by the coating.

AB - We measured the complex transverse acoustic impedance of superfluid 3He in the B phase by coating a surface with 4He to study the boundary condition dependence of the surface bound states. Observed features in the temperature dependence were similar to those without 4He coating. However, temperatures showing singularities became higher and variations in the dependence became smaller. The small variations indicated that a specular surface was realized by the 4He coating. Increase in the singularity temperature indicated that the bandwidth of the surface Andreev bound states became broader by the coating.

KW - Andreev bound states

KW - Helium-3

KW - Superfluid

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