Trimerized ground state of the spin-1 Heisenberg antiferromagnet on the kagome lattice

被引：45

作者：

Changlani, Hitesh J. ^{[1
,2
,3
]}

Laeuchli, Andreas M. ^{[3
]}

机构：

[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[2] Austrian Acad Sci, Inst Quantum Opt & Quantum Informat, A-6020 Innsbruck, Austria

[3] Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria

来源：

PHYSICAL REVIEW B | 2015年 / 91卷 / 10期

基金：

奥地利科学基金会;

关键词：

LIQUID; EXCITATIONS; SYSTEMS; PHASES; ORDER;

D O I：

10.1103/PhysRevB.91.100407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the phase diagram of the spin-1 quantum bilinear-biquadratic antiferromagnet on the kagome lattice using exact diagonalization and the density matrix renormalization group algorithm. The SU(3)-symmetric point of this model Hamiltonian is a spontaneously trimerized state whose qualitative nature persists even at the Heisenberg point, a finding that contrasts previous proposals. We report the ground state energy per site of the Heisenberg model to be - 1.410(2) and establish the presence of a spin gap.

引用

页数：5

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