NUMERICAL STUDY ON TUNNELING SPLITTING IN BIAIXAL SPIN SYSTEMS

• 来源期刊: 中国物理(海外版)
• 关键词: tunneling splitting biaxial spin systems numerical study
• 年，卷（期）: 2000,（11）
• 所属期刊栏目: CONDENSED MATTER:ELECTRONIC STRUCTURE
• 页码范围: 848-854
• 页数: 7页
• 分类号: 7500,0365
• 语种: 英文

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.