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Andreev reflection of quasiparticles by a vortex tangle in superfluid He-3-B?

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Andreev reflection of quasiparticles by a vortex tangle in superfluid He-3-B? / Fisher, Shaun N.; Guénault, A.M.; Hale, A. J. et al.
In: Journal of Low Temperature Physics, Vol. 121, No. 5-6, 07.2000, p. 393-398.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Fisher, SN, Guénault, AM, Hale, AJ & Pickett, GR 2000, 'Andreev reflection of quasiparticles by a vortex tangle in superfluid He-3-B?', Journal of Low Temperature Physics, vol. 121, no. 5-6, pp. 393-398. https://doi.org/10.1023/A:1017597529256

APA

Fisher, S. N., Guénault, A. M., Hale, A. J., & Pickett, G. R. (2000). Andreev reflection of quasiparticles by a vortex tangle in superfluid He-3-B? Journal of Low Temperature Physics, 121(5-6), 393-398. https://doi.org/10.1023/A:1017597529256

Vancouver

Fisher SN, Guénault AM, Hale AJ, Pickett GR. Andreev reflection of quasiparticles by a vortex tangle in superfluid He-3-B? Journal of Low Temperature Physics. 2000 Jul;121(5-6):393-398. doi: 10.1023/A:1017597529256

Author

Fisher, Shaun N. ; Guénault, A.M. ; Hale, A. J. et al. / Andreev reflection of quasiparticles by a vortex tangle in superfluid He-3-B?. In: Journal of Low Temperature Physics. 2000 ; Vol. 121, No. 5-6. pp. 393-398.

Bibtex

@article{af34339fa0184f288b83293af0b497d9,
title = "Andreev reflection of quasiparticles by a vortex tangle in superfluid He-3-B?",
abstract = "We have made the surprising discovery that the thermal damping of a vibrating wire resonator in superfluid He-3-B at ultra low temperatures is considerably depressed when a second wire in the vicinity is driven supercritically. The damping of a vibrating wire resonator at low velocities in the B-phase arises from the scattering of quasiparticle excitations and has a temperature dependence proportional to the Boltzmann factor exp(-Delta /kT) at low temperatures. At higher velocities (v > v(L)/3), the wire breaks Cooper pairs and emits a quasiparticle beam. At first sight it seems paradoxical that heating the superfluid can reduce the quasiparticle flux: on a neighbouring wire. We can only understand this on the basis that vorticity emitted by the supercritical wire shields, via Andreev reflection, part of the background quasiparticle flux: from reaching the other wire. If this interpretation, is correct, these techniques will provide a sensitive probe of vortex dynamics in the ultra low temperature regime.",
keywords = "helium-3, superfluid, turbulence",
author = "Fisher, {Shaun N.} and A.M. Gu{\'e}nault and Hale, {A. J.} and Pickett, {George R.}",
year = "2000",
month = jul,
doi = "10.1023/A:1017597529256",
language = "English",
volume = "121",
pages = "393--398",
journal = "Journal of Low Temperature Physics",
issn = "0022-2291",
publisher = "SPRINGER/PLENUM PUBLISHERS",
number = "5-6",

}

RIS

TY - JOUR

T1 - Andreev reflection of quasiparticles by a vortex tangle in superfluid He-3-B?

AU - Fisher, Shaun N.

AU - Guénault, A.M.

AU - Hale, A. J.

AU - Pickett, George R.

PY - 2000/7

Y1 - 2000/7

N2 - We have made the surprising discovery that the thermal damping of a vibrating wire resonator in superfluid He-3-B at ultra low temperatures is considerably depressed when a second wire in the vicinity is driven supercritically. The damping of a vibrating wire resonator at low velocities in the B-phase arises from the scattering of quasiparticle excitations and has a temperature dependence proportional to the Boltzmann factor exp(-Delta /kT) at low temperatures. At higher velocities (v > v(L)/3), the wire breaks Cooper pairs and emits a quasiparticle beam. At first sight it seems paradoxical that heating the superfluid can reduce the quasiparticle flux: on a neighbouring wire. We can only understand this on the basis that vorticity emitted by the supercritical wire shields, via Andreev reflection, part of the background quasiparticle flux: from reaching the other wire. If this interpretation, is correct, these techniques will provide a sensitive probe of vortex dynamics in the ultra low temperature regime.

AB - We have made the surprising discovery that the thermal damping of a vibrating wire resonator in superfluid He-3-B at ultra low temperatures is considerably depressed when a second wire in the vicinity is driven supercritically. The damping of a vibrating wire resonator at low velocities in the B-phase arises from the scattering of quasiparticle excitations and has a temperature dependence proportional to the Boltzmann factor exp(-Delta /kT) at low temperatures. At higher velocities (v > v(L)/3), the wire breaks Cooper pairs and emits a quasiparticle beam. At first sight it seems paradoxical that heating the superfluid can reduce the quasiparticle flux: on a neighbouring wire. We can only understand this on the basis that vorticity emitted by the supercritical wire shields, via Andreev reflection, part of the background quasiparticle flux: from reaching the other wire. If this interpretation, is correct, these techniques will provide a sensitive probe of vortex dynamics in the ultra low temperature regime.

KW - helium-3

KW - superfluid

KW - turbulence

U2 - 10.1023/A:1017597529256

DO - 10.1023/A:1017597529256

M3 - Journal article

VL - 121

SP - 393

EP - 398

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

SN - 0022-2291

IS - 5-6

ER -