Improved Ligand-Field Theoretical Calculations of R-Line Thermal Broadenings of MgO:Cr^(3+) and MgO:V^(2+)  

作　　者：ZHANG Zheng-Jie MA Dong-Ping 

机构地区：[1]Department of Physics, Chengdu University of Technology, Chengdu 610059, China [2]Department of Applied Physics, Sichuan University, Chengdu 610065, China

出　　处：《Communications in Theoretical Physics》2008年第11期1245-1248,共4页理论物理通讯（英文版）

基　　金：supported partially by National Natural Science Foundation of China under Grant No.40841012

摘　　要：With the values of parameters obtained from improved ligand-field theory,by taking into account all theirreducible representations and their components in EPI as well as all the levels and the admixtures of basic wavefunc-tions within d^3 electronic configuration,the R-line thermal broadenings(TB)of both MgO:Cr^(3+)and MgO:V^(2+)havemicroscopic-theoretically been calculated.The results are in very good agreement with the experimental data.It is foundthat the R-line TB of MgO:Cr^(3+)or MgO:V^(2+)comes from the first-order term of EPI.The elastic Raman scattering ofacoustic phonons plays a dominant role in R-line TB of MgO:Cr^(3+)or MgO:V^(2+).

关 键 词：improved ligand-field theory electron-phonon interaction R line thermal broadening elastic Raman scattering 

分 类 号：O45[理学—无线电物理]