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Study of the Dynamic Jahn-Teller Effect and the Far-infrared Spectra in ZnSe∶ Fe2+
Zhou Yiyang
Author NameAffiliationE-mail
Zhou Yiyang Institute of Solid State Physics, Sichuan Normal University, Chengdu 610066 yiyazhou@mail.sc.cninfo.net 
Abstract:
A great interest has been recently devoted to the Van Vleck semimagnetic semiconductors which exhibit interesting magnetic and magneto optical properties. However, the far-infrared spectra in the Van Vleck semimagnetic semiconductors ZnSe∶Fe2+do not fitthe standardized crystal-field theory and in particular exhibit additional lines. The Hamiltonian matrices for the ground state5D of 3d4/3d6ions are derived by taking into account the cubic crystal field interaction the spin-orbit coupling and the dynamic Jahn-Teller effect, as well as the far-infrared spectra of ZnSe∶Fe2+are studied b using these matrices. The theoretical results being in good agreement with the experimental observations indicate that the far-infrared spectrum levels in ZnSe∶Fe2+, which do not exist for the standard crystal-field theory, are due to the dynami Jahn-Teller effect in this crystal. In addition, some theoretical Jahn-Teller splitting presented are in need of further theoretical and experimental studies. The presentmatrix is useful for the study of fine structure spectra, EPR parameters an dynamic Jahn-Teller splittings of 3d4/3d6ions in the cubic crystal field.
Key words:  Dynamic Jahn-Teller effect, Far-infrared spectra, Fe2+, ZnSe
FundProject:国家自然科学基金(10247006)、四川省教育厅重点科研基金资助项目.
ZnSe: Fe2+中的动态Jahn-Teller效应和远红外光谱的研究
周一阳*
摘要:
推导了3d4/3d6离子基态 5D在立方晶体场、自旋-轨道耦合和动态Jahn-Teller效应作用下的哈密顿矩阵,并用对角化该哈密顿矩阵的方法研究了Fe2+在ZnSe中的远红外光谱,理论计算与实验符合得好.研究表明,在ZnSe∶ Fe2+中,比晶体场理论分析多出的分裂谱线是Fe2+与ZnSe晶格间的动态Jahn-Teller效应引起的.还预测了其它Jahn-Teller效应分裂谱.所推导的哈密顿矩阵对研究3d4/3d6离子在立方晶体中的精细光谱、电子顺磁共振谱和动态Jahn-Teller分裂都是有用的.
关键词:  动态Jahn-Teller效应  远红外光谱  Fe2+  ZnSe
DOI:10.1088/1674-0068/15/6/401-404
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