Symmetry Breaking on the Three-Dimensional Hyperkagome Lattice of Na4Ir3O8

被引：37

作者：

Bergholtz, E. J. ^{[1
]}

Laeuchli, A. M. ^{[1
]}

Moessner, R. ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 23期

关键词：

GADOLINIUM GALLIUM GARNET; QUANTUM; PYROCHLORE; PHASE;

D O I：

10.1103/PhysRevLett.105.237202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the antiferromagnetic spin-1/2 Heisenberg model on the highly frustrated, three-dimensional, hyperkagome lattice of Na4Ir3O8 using a series expansion method. We propose a valence bond crystal with a 72 site unit cell as a ground state that supports many, very low lying, singlet excitations. Low energy spinons and triplons are confined to emergent lower-dimensional motifs. Here, and for analogous kagome and pyrochlore states, we suggest finite temperature signatures, including an Ising transition, in the magnetic specific heat due to a multistep breaking of discrete symmetries.

引用

页数：4

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