An Extended Effective Potential Method with Topological Phase of Spin Tunneling
KOU Su-Peng1 , LÜ Rong2 , LIANG Jiu-Qing3
1 Department of Physics, Bejing Normal University, Beijing 100875
2 Center for Advanced Study, Tsinghua University, Beijing 100084
3 Department of Physics, Shanxi University, Shanxi 030006
An Extended Effective Potential Method with Topological Phase of Spin Tunneling
KOU Su-Peng1 ;LÜ Rong2 ;LIANG Jiu-Qing3
1 Department of Physics, Bejing Normal University, Beijing 100875
2 Center for Advanced Study, Tsinghua University, Beijing 100084
3 Department of Physics, Shanxi University, Shanxi 030006
关键词 ：
75.10.Jm ,
03.65.Sq ,
73.40.Gk ,
75.30.Gw
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.
Key words ：
75.10.Jm
03.65.Sq
73.40.Gk
75.30.Gw
出版日期: 2002-10-01
:
75.10.Jm
(Quantized spin models, including quantum spin frustration)
03.65.Sq
(Semiclassical theories and applications)
73.40.Gk
(Tunneling)
75.30.Gw
(Magnetic anisotropy)
引用本文:
KOU Su-Peng;LÜRong;LIANG Jiu-Qing. An Extended Effective Potential Method with Topological Phase of Spin Tunneling[J]. 中国物理快报, 2002, 19(10): 1525-1527.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2002/V19/I10/1525
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