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Geometric Phase Approach to Dielectricity Based on the Born-Oppenheimer Approximation |
| WANG Zheng-chuan;LI Bo-zang |
| Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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WANG Zheng-chuan, LI Bo-zang 1999 Chin. Phys. Lett. 16 703-705 |
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Abstract Macroscopic polarization differences in crystal dielectrics have been accurately treated by certain authors using the geometric phase approach. However, in their treatments the explicit meaning of the slowly varying parameters was not explored. In this paper we restudy the problem under the Born-Oppenheimer approximation. It turns out that the coordinates of nuclei in the system can be taken as the slowly varying parameters. In addition, our treatment is no longer restricted to the case of null electric field.
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03.65.Bz
77.90.+k
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Published: 01 October 1999
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| PACS: |
03.65.Bz
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77.90.+k
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(Other topics in dielectrics, piezoelectrics, and ferroelectrics and their properties)
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