Thermal boundary conductance between the U2D2 solid and B superfluid phases of3He

Y. P. Feng; P. Schiffer; D. D. Osheroff; M. C. Cross

doi:10.1007/BF00681893

Thermal boundary conductance between the U2D2 solid and B superfluid phases of³He

Y. P. Feng, P. Schiffer, D. D. Osheroff, M. C. Cross

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14 Scopus citations

Abstract

We present the first measurement of the thermal boundary conductance, 1/R_B, between the U2D2 spin ordered solid and the B superfluid phases of³He. We find that 1/R_B is exceedingly high, roughly seven orders of magnitude greater than that between sintered silver powder and liquid³He. For T<0.56 mK, 1/R_B appeared to be thermally activated, i.e. 1/R_B∼exp(-ε/k_BT), with ε=4.5(±0.5) mK, close to the superfluid gap energy. We also present a theory involving magnon-quasiparticle coupling as a model to explain the experimental observations.

Original language	English (US)
Pages (from-to)	475-490
Number of pages	16
Journal	Journal of Low Temperature Physics
Volume	90
Issue number	5-6
DOIs	https://doi.org/10.1007/BF00681893
State	Published - Mar 1993
Externally published	Yes

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics

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10.1007/BF00681893

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title = "Thermal boundary conductance between the U2D2 solid and B superfluid phases of3He",

abstract = "We present the first measurement of the thermal boundary conductance, 1/RB, between the U2D2 spin ordered solid and the B superfluid phases of3He. We find that 1/RB is exceedingly high, roughly seven orders of magnitude greater than that between sintered silver powder and liquid3He. For T<0.56 mK, 1/RB appeared to be thermally activated, i.e. 1/RB∼exp(-ε/kBT), with ε=4.5(±0.5) mK, close to the superfluid gap energy. We also present a theory involving magnon-quasiparticle coupling as a model to explain the experimental observations.",

author = "Feng, {Y. P.} and P. Schiffer and Osheroff, {D. D.} and Cross, {M. C.}",

year = "1993",

month = mar,

doi = "10.1007/BF00681893",

language = "English (US)",

volume = "90",

pages = "475--490",

journal = "Journal of Low Temperature Physics",

issn = "0022-2291",

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T1 - Thermal boundary conductance between the U2D2 solid and B superfluid phases of3He

AU - Feng, Y. P.

AU - Schiffer, P.

AU - Osheroff, D. D.

AU - Cross, M. C.

PY - 1993/3

Y1 - 1993/3

N2 - We present the first measurement of the thermal boundary conductance, 1/RB, between the U2D2 spin ordered solid and the B superfluid phases of3He. We find that 1/RB is exceedingly high, roughly seven orders of magnitude greater than that between sintered silver powder and liquid3He. For T<0.56 mK, 1/RB appeared to be thermally activated, i.e. 1/RB∼exp(-ε/kBT), with ε=4.5(±0.5) mK, close to the superfluid gap energy. We also present a theory involving magnon-quasiparticle coupling as a model to explain the experimental observations.

AB - We present the first measurement of the thermal boundary conductance, 1/RB, between the U2D2 spin ordered solid and the B superfluid phases of3He. We find that 1/RB is exceedingly high, roughly seven orders of magnitude greater than that between sintered silver powder and liquid3He. For T<0.56 mK, 1/RB appeared to be thermally activated, i.e. 1/RB∼exp(-ε/kBT), with ε=4.5(±0.5) mK, close to the superfluid gap energy. We also present a theory involving magnon-quasiparticle coupling as a model to explain the experimental observations.

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DO - 10.1007/BF00681893

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JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

IS - 5-6

ER -

Thermal boundary conductance between the U2D2 solid and B superfluid phases of³He

Abstract

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