Quantum melting of magnetic order due to orbital fluctuations

被引：261

作者：

Feiner, LF

Oles, AM

Zaanen, J

机构：

[1] MAX PLANCK INST FESTKORPERFORSCH,D-70569 STUTTGART,GERMANY

[2] LEIDEN UNIV,INST LORENTZ,NL-2300 RA LEIDEN,NETHERLANDS

[3] JAGIELLONIAN UNIV,INST PHYS,PL-30059 KRAKOW,POLAND

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 14期

关键词：

INSULATING PHASE; ANTIFERROMAGNETS; TRANSITION; MODEL; LATTICE; V2O3;

D O I：

10.1103/PhysRevLett.78.2799

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied the phase diagram and excitations of the spin-orbital model derived for a three-dimensional perovskite lattice, as in KCuF3. The results demonstrate that the orbital degeneracy drastically increases quantum fluctuations and suppresses the classical long-range order near the multicritical point in the mean-field phase diagram. This indicates the presence of a quantum liquid state, and we present explicit evidence for valence bond type correlations in three dimensions.

引用

页码：2799 / 2802

页数：4

共 30 条

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