中国物理B ›› 2000, Vol. 9 ›› Issue (11): 848-854.doi: 10.1088/1009-1963/9/11/011

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

NUMERICAL STUDY ON TUNNELING SPLITTING IN BIAIXAL SPIN SYSTEMS

陈芝得, 张树群   

  1. Department of Physics, Guangzhou Normal University, Guangzhou 510405, China
  • 收稿日期:2000-03-10 修回日期:2000-07-06 出版日期:2005-06-10 发布日期:2005-06-10
  • 基金资助:
    Project supported by Guangdong provincial Natural Science Foundation of China (Gront No. 994496).

NUMERICAL STUDY ON TUNNELING SPLITTING IN BIAIXAL SPIN SYSTEMS

Chen Zhi-de (陈芝得), Zhang Shu-qun (张树群)   

  1. Department of Physics, Guangzhou Normal University, Guangzhou 510405, China
  • Received:2000-03-10 Revised:2000-07-06 Online:2005-06-10 Published:2005-06-10
  • Supported by:
    Project supported by Guangdong provincial Natural Science Foundation of China (Gront No. 994496).

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摘要： 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.

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.

Key words: tunneling splitting, biaxial spin systems, numerical study

中图分类号:  (Tunneling, traversal time, quantum Zeno dynamics)

  • 03.65.Xp