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Berry Phases for Many-Spin Systems with Anisotropy Exchange Interaction in a Strong Magnetic Field |
YANG Lin-guang1;YAN Feng-li1;LI Bo-zang2 |
1Department of Physics, Hebei Normal University, Shijiazhuang 050016
2Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
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Cite this article: |
YANG Lin-guang, YAN Feng-li, LI Bo-zang 1999 Chin. Phys. Lett. 16 469-471 |
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Abstract An approximate instantaneous eigenstate is presented for the many-spin system possessing the anisotropy exchange interaction in a strong magnetic field by the perturbation method. Based on the instantaneous eigenstate, the Berry phase of this state is worked out. Furthermore, the effect of the anisotropy exchange interaction on the Berry phase of the state for the many-spin system is studied.
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Keywords:
03.65.Bz
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Published: 01 July 1999
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