The Berry phases for the many-spin systems with the uniaxial anisotropy exchange interaction in the weak and strong magnetic fields
Lixin Yang, Fengli Yan, B.-Z. Li
An approximate instantaneous eigenstate is presented for the many-spin system possessing the uniaxial anisotropy exchange interaction in the weak and strong magnetic field, respectively, by the perturbation method. Based on the instantaneous eigenstates, the Berry phases of them are worked out. Furthermore, the effect of the uniaxial anisotropy interaction on the Berry phases of the states for the many-spin system is studied.
Il Nuovo Cimento B•Sep 1, 2001•0 citations