Valence-bond crystal and anisotropic excitation spectrum on 3-dimensionally frustrated pyrochlore

被引：41

作者：

Isoda, M ^{[1
]}

Mori, S ^{[1
]}

机构：

[1] Fukuyama Univ, Dept Phys, Fukuyama, Hiroshima 7290292, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1998年 / 67卷 / 12期

关键词：

valence-bond crystal; tetrahedron singlet; pyrochlore; bond-operator; quantum Heisenberg; Y(Sc)Mn-2;

D O I：

10.1143/JPSJ.67.4022

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The valence-bond crystal is proposed as a ground state of spin-1/2 Heisenberg antiferromagnet on 3-dimensional fully frustrated pyrochlore by the Lond-operator theory. This crystal, formed as a set of RVB-like tetrahedral singlet states, has lower energy than the state consisting of two dimers in a tetrahedron. The spectra of triplet excitation have a finite gap and a symmetry lower than that of the lattice. The comparison with Y(Sc)Mn-2 is discussed.

引用

页码：4022 / 4025

页数：4

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