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Chinese Physics, 2000, Vol. 9(11): 848-854    DOI: 10.1088/1009-1963/9/11/011
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

NUMERICAL STUDY ON TUNNELING SPLITTING IN BIAIXAL SPIN SYSTEMS

Chen Zhi-de (陈芝得), Zhang Shu-qun (张树群)
Department of Physics, Guangzhou Normal University, Guangzhou 510405, China
Abstract  Numerical study on tunneling splitting in biaxial spin systems is done by performing diagonalization of the Hamilton operator. It is found that the calculated energy splitting agrees quantitatively with theoretical prediction of instanton method. Our result shows that both the instanton method and the large spin limit work well for the total spin around 10. By including the fourth-order term in Hamiltonian, experimental observation can be re-covered quantitatively.
Keywords:  tunneling splitting      biaxial spin systems      numerical study  
Received:  10 March 2000      Revised:  06 July 2000      Accepted manuscript online: 
PACS:  03.65.Xp (Tunneling, traversal time, quantum Zeno dynamics)  
Fund: Project supported by Guangdong provincial Natural Science Foundation of China (Gront No. 994496).

Cite this article: 

Chen Zhi-de (陈芝得), Zhang Shu-qun (张树群) NUMERICAL STUDY ON TUNNELING SPLITTING IN BIAIXAL SPIN SYSTEMS 2000 Chinese Physics 9 848

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