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

来源：

CommunicationsinTheoreticalPhysics | 2012年 / 58卷 / 09期

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].

引用

页码：441 / 444

页数：4