Orbital-spin structure and lattice coupling in RTiO3 where R=La, Pr, Nd, and Sm -: art. no. 167203

被引：82

作者：

Mochizuki, M ^{[1
]}

Imada, M ^{[1
]}

机构：

[1] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.91.167203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The origin of the G-type antiferromagnetism [AFM(G)] and puzzling properties of RTiO3 with R=La are studied. We clarify that the crystal field from La caused by the GdFeO3-type distortion lifts the t(2g) degeneracy at Ti 3d orbitals. The lift stabilizes the AFM(G) with spin-exchange constant in agreement with neutron-scattering results. The orbital-spin structures for R=Pr, Nd, and Sm are also consistent with experiments. We propose that the GdFeO3-type distortion has a universal mechanism of controlling orbital-spin structure competing with the Jahn-Teller (JT) mechanism.

引用

页数：4

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