Low-temperature specific heat of a random Heisenberg chain in the large-S limit


Avgin İ. , Huber D.

PHYSICAL REVIEW B, vol.56, no.5, pp.2320-2321, 1997 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 56 Issue: 5
  • Publication Date: 1997
  • Doi Number: 10.1103/physrevb.56.2320
  • Title of Journal : PHYSICAL REVIEW B
  • Page Numbers: pp.2320-2321

Abstract

Results are presented for the low-temperature specific heat of a disordered Heisenberg chain with random +/-J interactions in the large-spin limit. The specific heat varies at T-2/3 with a coefficient that depends on the relative fractions of positive and negative bonds. The coefficient is calculated exactly for the equal-probability distribution. There is also a brief analysis of the destabilizing effects of an applied magnetic field.