光学学报, 2010, 30 (12): 3649, 网络出版: 2010-12-07
LiNbO3Ni2+晶体的精细光谱和扬特勒效应焦
Spectral Fine Structure and Jahn-Teller Effect of LiNbO3Ni2+ Crystals
光谱学 LiNbO3Ni2+晶体 微观磁效应 零场分裂参量 光谱精细结构 扬特勒效应 spectroscopy LiNbO3Ni2+ crystal microscopic magnetic interactions zero-field splitting parameters spectral fine structure Jahn-Teller effect
摘要
应用晶体场理论和不可约张量算符方法构造了3d8态离子在C3v对称晶场中包含自旋轨道相互作用、自旋自旋相互作用、自旋轨道相互作用和其它轨道其它轨道相互作用4种微观磁效应的45阶可完全对角化的能量哈密顿矩阵。研究表明LiNbO3Ni2+晶体中存在扬特勒(Jahn-Teller)效应;自旋轨道相互作用对晶体光谱和零场分裂参量的贡献是最主要的,考虑其他3种微观磁效应后计算值更加接近实验值。
Abstract
Applying crystal field theory and irreducible representation method, the completely diagonalized Hamiltonian matrices of 3d8 ion configurations in the trigonal symmetry sites have been established, which include four kinds of microscopic magnetic interactions: spin-orbit interaction, spin-spin interaction, spin-other-orbit interaction and orbit-orbit interaction. Based on the matries, spectral fine structure and zero-field splitting parameters of LiNbO3Ni2+ crystall are calculated. Jahn-Teller effect, and effects of four microscopic magnetic interoctions on crystal spectral and zero-field splitting parameter are investigated. The results show that Jahn-Teller effect exists in this crystal and spin-orbit interaction makes uppermost contribution to energy level and zero-field splitting parameters while calculated values will be closer to the experimental values when the other three interactions are taken into account.
焦杨, 殷春浩, 白秋飞, 梁宁. LiNbO3Ni2+晶体的精细光谱和扬特勒效应焦[J]. 光学学报, 2010, 30(12): 3649. Jiao Yang, Yin Chunhao, Bai Qiufei, Liang Ning. Spectral Fine Structure and Jahn-Teller Effect of LiNbO3Ni2+ Crystals[J]. Acta Optica Sinica, 2010, 30(12): 3649.