Orbital order out of spin disorder: how to measure the orbital gap

被引：9

作者：

Khaliullin, G

Kilian, R

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1999年 / 11卷 / 48期

关键词：

D O I：

10.1088/0953-8984/11/48/333

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The interplay between spin and orbital degrees of freedom in the Mott-Hubbard insulator is studied by considering an orbitally degenerate superexchange model. We argue that orbital order and the orbital excitation gap in this model are generated through the order-from-disorder mechanism known previously from frustrated spin models. We propose that the orbital gap should show up indirectly in the dynamical spin structure factor; it can therefore be measured using the conventional inelastic neutron scattering method.

引用

收藏

页码：9757 / 9763

页数：7

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