Thermodynamics of the anisotropic two-channel Kondo problem | |
Article | |
关键词: DEGENERATE ELECTRON-GAS; FERMI-LIQUID BEHAVIOR; 2-LEVEL SYSTEM; AMORPHOUS METALS; MODEL; UNIVERSALITY; TEMPERATURE; ENERGY; POINT; FIELD; | |
DOI : 10.1103/PhysRevB.65.134416 | |
来源: SCIE |
【 摘 要 】
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 T-K 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.
【 授权许可】
Free