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An Extended Effective Potential Method with Topological Phase of Spin Tunneling |
| KOU Su-Peng1;LÜ Rong2;LIANG Jiu-Qing3 |
| 1Department of Physics, Bejing Normal University, Beijing 100875
2Center for Advanced Study, Tsinghua University, Beijing 100084
3Department of Physics, Shanxi University, Shanxi 030006 |
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| Cite this article: |
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KOU Su-Peng, LÜ, Rong et al 2002 Chin. Phys. Lett. 19 1525-1527 |
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Abstract An extended effective potential (EEP) method is proposed to calculate the spin tunneling splitting of a single-domain ferromagnetic grain. By adding a phase factor to replace the boundary condition, the new method is not only accurate but also shows topological effects. In the large spin limit, the results from spin-coherent-state path integral have systematic disparity with numerical studies, while those from the EEP method agree well with numerical studies.
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| Keywords:
75.10.Jm
03.65.Sq
73.40.Gk
75.30.Gw
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Published: 01 October 2002
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| PACS: |
75.10.Jm
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(Quantized spin models, including quantum spin frustration)
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03.65.Sq
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(Semiclassical theories and applications)
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73.40.Gk
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(Tunneling)
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75.30.Gw
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(Magnetic anisotropy)
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