自旋三重态对半磁半导体Cd_（1－x）Fe_xTe和Cd_（1－x）Fe_xSe的基态精细结构分裂的影响  

SPIN TRIPLET CONTRIBUTIN TO THE FINE STRUCTURE SPLITTINGS OF THE GROUND STATE FOR SMSC Cd 1- x Fe x Te AND Cd 1- x Fe x Se *

作　　者：李福珍[1] 

机构地区：[1]四川师范大学物理系

出　　处：《四川师范大学学报（自然科学版）》1996年第5期34-36,共3页Journal of Sichuan Normal University（Natural Science）

基　　金：国家自然科学基金

摘　　要：本文在强场图象下推导了３ｄ４／３ｄ６离子在三角晶场中包括自旋－轨道相互作用的哈密顿矩阵公式．采用双ＳＯ轨道模型计算了Ｆｅ２＋离子在Ⅱ－Ⅵ半磁半导体ＣｄＴｅ和ＣｄＳｅ中的基态精细结构分裂（ＦＳＳ）．理论计算的ＦＳＳ和实验结果符合很好．In this paper, the Hamiltonian matrix of 3d 4/3d 6 ion in trigonal symmetry, including the crystal field and the spin orbit interactions, has been derived. The fine structure splittings(FSS) of the ground state of Fe 2+ ions in Ⅱ Ⅵ semimagnetic semiconductors (SMSC) CdTe and CdSe are obtained by a molecular orbital approach. The theoretical FSS are in good agreement with the experiments. The results obtained indicate that spin triplet contribution to FSS of the ground state is very important.

关 键 词：晶体场 半磁半导体 自旋三重态 FSS 半导体 

分 类 号：O471.4[理学—半导体物理]