Abstract
The specific heat of superfluid He{sup 3}, disordered by a silica aerogel, is found to have a sharp discontinuity marking the thermodynamic transition to superfluidity at a temperature reduced from that of bulk He{sup 3}. The magnitude of the discontinuity is also suppressed. This disorder effect can be understood from the Ginzburg-Landau theory which takes into account elastic quasiparticle scattering suppressing both the transition temperature and the amplitude of the order parameter. We infer that the limiting temperature dependence of the specific heat is linear at low temperatures in the disordered superfluid state, consistent with predictions of gapless excitations everywhere on the Fermi surface.
Choi, H;
Yawata, K;
Haard, T M;
Davis, J P;
Gervais, G;
Mulders, N;
Sharma, P;
Sauls, J A;
Halperin, W P
[1]
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States)
Citation Formats
Choi, H, Yawata, K, Haard, T M, Davis, J P, Gervais, G, Mulders, N, Sharma, P, Sauls, J A, and Halperin, W P.
Specific heat of disordered superfluid He{sup 3}.
United States: N. p.,
2004.
Web.
doi:10.1103/PhysRevLett.93.145301.
Choi, H, Yawata, K, Haard, T M, Davis, J P, Gervais, G, Mulders, N, Sharma, P, Sauls, J A, & Halperin, W P.
Specific heat of disordered superfluid He{sup 3}.
United States.
https://doi.org/10.1103/PhysRevLett.93.145301
Choi, H, Yawata, K, Haard, T M, Davis, J P, Gervais, G, Mulders, N, Sharma, P, Sauls, J A, and Halperin, W P.
2004.
"Specific heat of disordered superfluid He{sup 3}."
United States.
https://doi.org/10.1103/PhysRevLett.93.145301.
@misc{etde_20617559,
title = {Specific heat of disordered superfluid He{sup 3}}
author = {Choi, H, Yawata, K, Haard, T M, Davis, J P, Gervais, G, Mulders, N, Sharma, P, Sauls, J A, and Halperin, W P}
abstractNote = {The specific heat of superfluid He{sup 3}, disordered by a silica aerogel, is found to have a sharp discontinuity marking the thermodynamic transition to superfluidity at a temperature reduced from that of bulk He{sup 3}. The magnitude of the discontinuity is also suppressed. This disorder effect can be understood from the Ginzburg-Landau theory which takes into account elastic quasiparticle scattering suppressing both the transition temperature and the amplitude of the order parameter. We infer that the limiting temperature dependence of the specific heat is linear at low temperatures in the disordered superfluid state, consistent with predictions of gapless excitations everywhere on the Fermi surface.}
doi = {10.1103/PhysRevLett.93.145301}
journal = []
issue = {14}
volume = {93}
journal type = {AC}
place = {United States}
year = {2004}
month = {Oct}
}
title = {Specific heat of disordered superfluid He{sup 3}}
author = {Choi, H, Yawata, K, Haard, T M, Davis, J P, Gervais, G, Mulders, N, Sharma, P, Sauls, J A, and Halperin, W P}
abstractNote = {The specific heat of superfluid He{sup 3}, disordered by a silica aerogel, is found to have a sharp discontinuity marking the thermodynamic transition to superfluidity at a temperature reduced from that of bulk He{sup 3}. The magnitude of the discontinuity is also suppressed. This disorder effect can be understood from the Ginzburg-Landau theory which takes into account elastic quasiparticle scattering suppressing both the transition temperature and the amplitude of the order parameter. We infer that the limiting temperature dependence of the specific heat is linear at low temperatures in the disordered superfluid state, consistent with predictions of gapless excitations everywhere on the Fermi surface.}
doi = {10.1103/PhysRevLett.93.145301}
journal = []
issue = {14}
volume = {93}
journal type = {AC}
place = {United States}
year = {2004}
month = {Oct}
}