Magnetic excitations in the orbitally degenerate triangular lattice LiVO2

被引：3
|
作者：
Tian, W. [1 ]
Stone, M. B.
Mandrus, D. G.
Sales, B. C.
Jin, R.
Adroja, D. T.
Nagler, S. E.
机构：
[1] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
[2] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
[3] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England
来源：
PHYSICA B-CONDENSED MATTER | 2006年 / 385卷
关键词：
transition metal antiferromagnet; two-dimensional triangular lattice; orbital ordering;
D O I：
10.1016/j.physb.2006.05.099
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report an inelastic-neutron scattering study of the magnetic excitations in LiVO2, a two-dimensional triangular lattice of V3+ (S = 1) ions with orbital ordering involving threefold degenerate t(2g) orbitals. At temperatures well below the phase transition temperature T-t approximate to 500 K, an excitation at similar to 58meV is observed which we identify as a candidate for the principal singlet-to-triplet magnetic transition. Additional excitations are also observed at lower and higher energies. Our results suggest that orbital degeneracy plays an important role in understanding the unusual magnetic properties of LiVO2. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：50 / 52
页数：3
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