Nonlinear heat transport near the superfluid transition ofHe4
- 9 December 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 67 (24), 3404-3407
- https://doi.org/10.1103/physrevlett.67.3404
Abstract
We investigate the effect of a finite heat current Q on the superfluid transition of . We perform a renormalization-group (RG) calculation of the temperature profile and of the critical thermal conductivity (Q) in the nonlinear-response regime. In the experimentally accessible region close to we predict the divergence (Q)∼ with the effective exponent ≊0.31. An experiment is proposed to detect this nonlinear effect. We also present the exact RG result x=(2ν for the depression of the transition temperature -(Q)∼.
Keywords
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