摘要
Using the nonequilibrium Green＇s function technique, we investigate the Kondo effect in the quantum dot with perpendicular magnetic fields, in which one is the Zeeman splitting lies in the z-direction and the other is the spin flip points at the x-direction. It is found whatever one or two magnetic fields are applied, the local density of states （LDOS） will split into two peaks. The positions of two Kondo resonance peaks are determined by Zeeman energy △ when J = 0, and by √△^2＋J^2 when J≠0.
基金
Supported by the Special Funds of the National Science Foundation of China under Grant No.10847133
the National Science Foundation of Education Bureau of Jiangsu Province under Grant No.08KJB140002
the Natural Science Foundation of Fujian Province under Grant No.A061004
