Surface Andreev bound states of the superfluid 3He B phase

Ryuji Nomura, Satoshi Murakawa, Yuichiro Wada, Yuta Tamura, Masahiro Wasai, Kouki Akiyama, Masamichi Saitoh, Yuki Aoki, Yuichi Okuda

Research output: Contribution to journalArticle

Abstract

Surface Andreev bound states of superfluid 3He have been detected by transverse acoustic impedance measurement. In the diffusive limit of the quasiparticle scattering off a wall, a singularity in the temperature dependence of the acoustic impedance appears at a particular temperature. At this temperature, pair excitations of the surface Andreev bound state quasiparticle and the propagating Bogoliubov quasiparticle drastically change their nature due to a very sharp band edge of the surface Andreev bound states, resulting in the singularity of the acoustic impedance. This temperature dependence was well reproduced by a theory which properly takes into account the surface Andreev bound states. In a partially specular wall boundary condition achieved by coating the wall with thin 4He layers, the singularity shifted to a higher temperature since the bandwidth became broader as the specularity increased. The coating with 4He influences only the states in the vicinity of the wall and thus the shift is further evidence that the transverse acoustic impedance senses the surface Andreev bound states.

Original languageEnglish
Pages (from-to)718-721
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume43
Issue number3
DOIs
Publication statusPublished - 2011 Jan

Fingerprint

acoustic impedance
Acoustic impedance
Acoustic impedance measurement
Temperature
coatings
Coatings
temperature dependence
impedance measurement
Boundary conditions
Scattering
boundary conditions
bandwidth
Bandwidth
temperature
shift
scattering
excitation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials

Cite this

Nomura, R., Murakawa, S., Wada, Y., Tamura, Y., Wasai, M., Akiyama, K., ... Okuda, Y. (2011). Surface Andreev bound states of the superfluid 3He B phase. Physica E: Low-Dimensional Systems and Nanostructures, 43(3), 718-721. https://doi.org/10.1016/j.physe.2010.07.037

Surface Andreev bound states of the superfluid 3He B phase. / Nomura, Ryuji; Murakawa, Satoshi; Wada, Yuichiro; Tamura, Yuta; Wasai, Masahiro; Akiyama, Kouki; Saitoh, Masamichi; Aoki, Yuki; Okuda, Yuichi.

In: Physica E: Low-Dimensional Systems and Nanostructures, Vol. 43, No. 3, 01.2011, p. 718-721.

Research output: Contribution to journalArticle

Nomura, R, Murakawa, S, Wada, Y, Tamura, Y, Wasai, M, Akiyama, K, Saitoh, M, Aoki, Y & Okuda, Y 2011, 'Surface Andreev bound states of the superfluid 3He B phase', Physica E: Low-Dimensional Systems and Nanostructures, vol. 43, no. 3, pp. 718-721. https://doi.org/10.1016/j.physe.2010.07.037
Nomura, Ryuji ; Murakawa, Satoshi ; Wada, Yuichiro ; Tamura, Yuta ; Wasai, Masahiro ; Akiyama, Kouki ; Saitoh, Masamichi ; Aoki, Yuki ; Okuda, Yuichi. / Surface Andreev bound states of the superfluid 3He B phase. In: Physica E: Low-Dimensional Systems and Nanostructures. 2011 ; Vol. 43, No. 3. pp. 718-721.
@article{4777889bbd14439e8dd0475fe729745b,
title = "Surface Andreev bound states of the superfluid 3He B phase",
abstract = "Surface Andreev bound states of superfluid 3He have been detected by transverse acoustic impedance measurement. In the diffusive limit of the quasiparticle scattering off a wall, a singularity in the temperature dependence of the acoustic impedance appears at a particular temperature. At this temperature, pair excitations of the surface Andreev bound state quasiparticle and the propagating Bogoliubov quasiparticle drastically change their nature due to a very sharp band edge of the surface Andreev bound states, resulting in the singularity of the acoustic impedance. This temperature dependence was well reproduced by a theory which properly takes into account the surface Andreev bound states. In a partially specular wall boundary condition achieved by coating the wall with thin 4He layers, the singularity shifted to a higher temperature since the bandwidth became broader as the specularity increased. The coating with 4He influences only the states in the vicinity of the wall and thus the shift is further evidence that the transverse acoustic impedance senses the surface Andreev bound states.",
author = "Ryuji Nomura and Satoshi Murakawa and Yuichiro Wada and Yuta Tamura and Masahiro Wasai and Kouki Akiyama and Masamichi Saitoh and Yuki Aoki and Yuichi Okuda",
year = "2011",
month = "1",
doi = "10.1016/j.physe.2010.07.037",
language = "English",
volume = "43",
pages = "718--721",
journal = "Physica E: Low-Dimensional Systems and Nanostructures",
issn = "1386-9477",
publisher = "Elsevier",
number = "3",

}

TY - JOUR

T1 - Surface Andreev bound states of the superfluid 3He B phase

AU - Nomura, Ryuji

AU - Murakawa, Satoshi

AU - Wada, Yuichiro

AU - Tamura, Yuta

AU - Wasai, Masahiro

AU - Akiyama, Kouki

AU - Saitoh, Masamichi

AU - Aoki, Yuki

AU - Okuda, Yuichi

PY - 2011/1

Y1 - 2011/1

N2 - Surface Andreev bound states of superfluid 3He have been detected by transverse acoustic impedance measurement. In the diffusive limit of the quasiparticle scattering off a wall, a singularity in the temperature dependence of the acoustic impedance appears at a particular temperature. At this temperature, pair excitations of the surface Andreev bound state quasiparticle and the propagating Bogoliubov quasiparticle drastically change their nature due to a very sharp band edge of the surface Andreev bound states, resulting in the singularity of the acoustic impedance. This temperature dependence was well reproduced by a theory which properly takes into account the surface Andreev bound states. In a partially specular wall boundary condition achieved by coating the wall with thin 4He layers, the singularity shifted to a higher temperature since the bandwidth became broader as the specularity increased. The coating with 4He influences only the states in the vicinity of the wall and thus the shift is further evidence that the transverse acoustic impedance senses the surface Andreev bound states.

AB - Surface Andreev bound states of superfluid 3He have been detected by transverse acoustic impedance measurement. In the diffusive limit of the quasiparticle scattering off a wall, a singularity in the temperature dependence of the acoustic impedance appears at a particular temperature. At this temperature, pair excitations of the surface Andreev bound state quasiparticle and the propagating Bogoliubov quasiparticle drastically change their nature due to a very sharp band edge of the surface Andreev bound states, resulting in the singularity of the acoustic impedance. This temperature dependence was well reproduced by a theory which properly takes into account the surface Andreev bound states. In a partially specular wall boundary condition achieved by coating the wall with thin 4He layers, the singularity shifted to a higher temperature since the bandwidth became broader as the specularity increased. The coating with 4He influences only the states in the vicinity of the wall and thus the shift is further evidence that the transverse acoustic impedance senses the surface Andreev bound states.

UR - http://www.scopus.com/inward/record.url?scp=78651107874&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78651107874&partnerID=8YFLogxK

U2 - 10.1016/j.physe.2010.07.037

DO - 10.1016/j.physe.2010.07.037

M3 - Article

AN - SCOPUS:78651107874

VL - 43

SP - 718

EP - 721

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

SN - 1386-9477

IS - 3

ER -