Roles of Electron Hopping on Orbital Ordering for Vanadium Spinels

被引:0
作者
黄元杰 [1 ]
张裕恒 [1 ]
机构
[1] High Magnetic Field Laboratory,Chinese Academy of Sciences and University of Science and Technology of China
关键词
orbital ordering; Jahn-Teller effect; orbital-spin coupling;
D O I
暂无
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We investigate the orbital ordering quantitatively for the spinel systems RV 2 O 4(R=Mg,Zn,Cd) in the viewpoint of single-ion physics through the method of diagonalization.Through the quantitative calculation,it is found that the spin-orbit(SO)coupling and the Jahn-Teller(JT) effect enable the orbital ordering under the conditions of negligible electron hopping among different V 3+ sites.For the systems RV 2 O 4,the electron hopping is implied to be observable from the energy gap in conductivity,so the orbital ordering of RV 2 O 4 cannot be induced by the SO coupling and JT effect at definite temperature,which is on contrary to the conclusions in [Phys.Rev.Lett.93(2004) 157206].
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页码:441 / 444
页数:4
相关论文
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[1]  
G. Khaliullin. Phys. Rev. B . 2001