Abstract
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 and at temperatures below the Kondo temperature a two-channel Kondo effect develops characterized by a Wilson ratio and a logarithmic divergence of the susceptibility and the linear specific-heat coefficient. A finite magnetic field, drives the system to a Fermi-liquid fixed point with an unusual Wilson ratio which depends sensitively on h.
- Received 10 October 2001
DOI:https://doi.org/10.1103/PhysRevB.65.134416
©2002 American Physical Society