For authors
Submission status

Archive (English)
   Volumes 61-80
   Volumes 41-60
   Volumes 21-40
   Volumes 1-20
   Volumes 81-92
      Volume 92
      Volume 91
      Volume 90
      Volume 89
      Volume 88
      Volume 87
      Volume 86
      Volume 85
      Volume 84
      Volume 83
      Volume 82
      Volume 81
VOLUME 92 | ISSUE 8 | PAGE 585
Second wind of the Dulong-Petit Law at a quantum critical point
V. A. Khodel^{+\nabla}, J. W. Clark^\nabla, V. R. Shaginyan*/, M. V. Zverev
+Russian Research Center Kurchatov Institute, 123182 Moscow, Russia ^\nablaMcDonnell Center for the Space Sciences & Department of Physics, Washington University, St. Louis, MO 63130, USA *Petersburg Nuclear Physics Institute RAS, 188300 Gatchina, Russia °Moscow Institute of Rhysics and Technology, 123098 Moscow, Russia
Renewed interest in 3He physics has been stimulated by experimental observation of non-Fermi-liquid behavior of dense 3He films at low temperatures. Abnormal behavior of the specific heat C(T) of two-dimensional liquid 3He is demonstrated in the occurrence of a T-independent β term in C(T). To uncover the origin of this phenomenon, we have considered the group velocity of transverse zero sound propagating in a strongly correlated Fermi liquid. For the first time, it is shown that if two-dimensional liquid 3He is located in the vicinity of the quantum critical point associated with a divergent quasiparticle effective mass, the group velocity depends strongly on temperature and vanishes as T is lowered toward zero. The predicted vigorous dependence of the group velocity can be detected in experimental measurements on liquid 3He films. We have demonstrated that the contribution to the specific heat coming from the boson part of the free energy due to the transverse zero-sound mode follows the Dulong-Petit Law. In the case of two-dimensional liquid 3He, the specific heat becomes independent of temperature at some characteristic temperature of a few mK.

Download PS file (GZipped, 96K)  |  Download PDF file (194.7K)

Список работ, цитирующих данную статью, см. здесь.

List of articles citing this article can be found here.