摘要
在中间场耦合图象中，利用Racak不可约张量算符法和Wigner－Eckart定理，建立了3d7（C3v）电子组态的完全能量矩阵；利用该矩阵研究了Co2＋：ZnAl2O4晶体的电子光谱，理论与观测十分吻合．首次定量地解释了2E态的双重谱线结构，并从理论上预言了4A2基态2．93cm-1的零场分裂（ZFS）．研究结果定量地表明，Jahn－Teller效应所致Co2＋：ZnAl2O4晶体Co2＋中心局域结构的畸变假设是合理的．
In the intermediate crystal-field coupling scheme,the full energy matrices of C3v group for d7 configuration have been derived in terms of the Racah irreducible tensor operator technique and the Winger-Eckart theorm- The electron spectra of Co2+: ZnAl2O4 crystal have been calculated in terms of the full energy matrices, the calculated result has agreed well with the experimental findings, in particular, the double spectra structure of T state is interpreted first, and the ZFS of the ground state 4A2 about 2. 93cm-1 is predicted. The results show that the assumption of the trigonal distortion arised from Jahn-Teller effect is reasonable for Co2+: ZnAl2O4 crystal.
出处
《光子学报》
EI
CAS
CSCD
1997年第4期298-302,共5页
Acta Photonica Sinica
基金
陕西省自然科学基金
宝鸡文理学院青年教师基金
关键词
ZNAL2O4
电子光谱
^2E态双重谱线
晶体
J-T效应
Co2+: ZnAl2O4
Electron spectra
Double spectra structure of the 2E state
Jahn-Teller effect:Triqonal distortion
