Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - The thermal conductivity of superfluid He-3 in aerogel: a measurement of the energy gap.
AU - Fisher, Shaun N.
AU - Guénault, A.M.
AU - Hale, A. J.
AU - Pickett, George R.
PY - 2002/1
Y1 - 2002/1
N2 - Transport properties of superfluid He-3 in aerogel are governed by a fixed paean free path set by the typical dimensions of the strand separation. We describe preliminary measurements of the thermal conductivity of superfluid He-3 confined in 98% silica aerogel. The majority of the measurements are made in relatively high magnetic fields where the superfluid within the aerogel is in the A-phase like state. Since the quasiparticle mean free path is fixed, the temperature dependence of the thermal conductivity depends only on the superfluid energy gap and on the texture in the case of the A-phase. The results so far obtained are broadly consistent with the aerogel-confined superfluid having a temperature dependent energy gap close to the BCS prediction although there are significant deviations at the lowest temperatures.
AB - Transport properties of superfluid He-3 in aerogel are governed by a fixed paean free path set by the typical dimensions of the strand separation. We describe preliminary measurements of the thermal conductivity of superfluid He-3 confined in 98% silica aerogel. The majority of the measurements are made in relatively high magnetic fields where the superfluid within the aerogel is in the A-phase like state. Since the quasiparticle mean free path is fixed, the temperature dependence of the thermal conductivity depends only on the superfluid energy gap and on the texture in the case of the A-phase. The results so far obtained are broadly consistent with the aerogel-confined superfluid having a temperature dependent energy gap close to the BCS prediction although there are significant deviations at the lowest temperatures.
KW - helium-3
KW - superfluid
KW - aerogel
KW - thermal conductivity
U2 - 10.1023/A:1013752109242
DO - 10.1023/A:1013752109242
M3 - Journal article
VL - 126
SP - 673
EP - 678
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
SN - 0022-2291
IS - 1-2
ER -