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 - Thermodynamics of the A-B phase transition and the geometry of the A-phase gap nodes in superfluid He-3 at low temperatures
AU - Bartkowiak, M.
AU - Daley, S. W. J.
AU - Fisher, Shaun N.
AU - Guénault, A.M.
AU - Plenderleith, G. N.
AU - Haley, Richard P.
AU - Pickett, George R.
AU - Skyba, P.
PY - 1999/10
Y1 - 1999/10
N2 - Since the A phase of superfluid He-3 has an energy gap with nodes while the B phase has a uniform gap, the entropies of the two phases are very different at low temperatures. The latent heat of the A-B transition is thus relatively large and provides a convenient probe for examining the structure of the A-phase gap nodes at low temperatures. We report here measurements of the latent heal down to similar to 150 mu K which show that at least to this temperature, the A-phase gap near the nodes is increasing linearly with deviation of the k vector from the nodal line. From the measurements of the latent heat and of the transition field B-AB we can determine the magnetization difference between the two phases.
AB - Since the A phase of superfluid He-3 has an energy gap with nodes while the B phase has a uniform gap, the entropies of the two phases are very different at low temperatures. The latent heat of the A-B transition is thus relatively large and provides a convenient probe for examining the structure of the A-phase gap nodes at low temperatures. We report here measurements of the latent heal down to similar to 150 mu K which show that at least to this temperature, the A-phase gap near the nodes is increasing linearly with deviation of the k vector from the nodal line. From the measurements of the latent heat and of the transition field B-AB we can determine the magnetization difference between the two phases.
KW - Superfluid He-3
U2 - 10.1103/PhysRevLett.83.3462
DO - 10.1103/PhysRevLett.83.3462
M3 - Journal article
VL - 83
SP - 3462
EP - 3465
JO - Physical review letters
JF - Physical review letters
SN - 1079-7114
IS - 17
ER -