Thermodynamics of the anisotropic two-channel Kondo problem

Natan Andrei, Gergely Zaránd, Theo Costi, Andres Jerez

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We construct and solve numerically the thermodynamic Bethe-ansatz equations for the spin-anisotropic two-channel Kondo model in arbitrary external field h. At high temperatures the specific heat and the susceptibility show power-law dependence. For h→0 and at temperatures below the Kondo temperature TK a two-channel Kondo effect develops characterized by a Wilson ratio 8/3, and a logarithmic divergence of the susceptibility and the linear specific-heat coefficient. A finite magnetic field, h>0, drives the system to a Fermi-liquid fixed point with an unusual Wilson ratio which depends sensitively on h.

Original languageEnglish (US)
Article number134416
Pages (from-to)1344161-1344169
Number of pages9
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number13
StatePublished - Apr 1 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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