Frustrated superexchange interaction versus orbital order in a LaVO3 crystal

被引：21

作者：

Zhou, J. -S. ^{[1
]}

Ren, Y. ^{[2
]}

Yan, J. -Q. ^{[3
]}

Mitchell, J. F. ^{[4
]}

Goodenough, J. B. ^{[1
]}

机构：

[1] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA

[2] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[3] Ames Lab, Ames, IA 50011 USA

[4] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.100.046401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements of magnetic, transport properties, thermal conductivity, and magnetization under pressure as well as neutron diffraction have been made on a single crystal and powder sample of LaVO(3). The Neel temperature was found to mark a transition from the phase with both frustrated superexchange interaction and spin-orbit lambda L.S coupling to the phase where the Jahn-Teller orbital-lattice coupling dominates. The dramatic reduction of absolute entropy in the paramagnetic phase is explained in terms of forming a long-range coherent state due to the interference between frustrated orbits and spins.

引用

页数：4

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