PHONON-INDUCED CORRECTIONS TO GROUND-STATE SPLITTING OF S-STATE IONS IN CUBIC CRYSTALS

被引:45
作者
SHRIVASTAVA, KN
机构
[1] Department of Physics, Montana State University, Bozeman
[2] Department of Physics, University of Nottingham
来源
PHYSICAL REVIEW | 1969年 / 187卷 / 02期
关键词
D O I
10.1103/PhysRev.187.446
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The ground S6 and excited L4 states of the Mn2+ ion are perturbed by the cubic crystalline field and mixed by the spin-orbit coupling. A two-phonon Raman process, second order in the orbit-lattice interaction, is found to contribute to the ground-state splitting. The theory is developed within the framework of Van Vleck's small-wave-vector averaging procedure for acoustic phonons. Both the zero-point vibrational contribution and the temperature-dependent parts are calculated and compared with experimental measurements in Mn2+-doped MgO. Good qualitative agreement between the theory and experiment is found but quantitative agreement is not obtained. © 1969 The American Physical Society.
引用
收藏
页码:446 / +
页数:1
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