Cluster quantum Monte Carlo study of two-dimensional weakly coupled frustrated trimer antiferromagnets

被引：4

作者：

Weber, Lukas ^{[1
,2
]}

Caci, Nils ^{[1
,2
]}

Wessel, Stefan ^{[1
,2
]}

机构：

[1] Rhein Westfal TH Aachen, JARA Fundamentals Future Informat Technol, Inst Theoret Solid State Phys, D-52056 Aachen, Germany

[2] JARA Ctr Simulat & Data Sci, D-52056 Aachen, Germany

来源：

PHYSICAL REVIEW B | 2022年 / 106卷 / 03期

关键词：

SIGN PROBLEM; KAGOME; SIMULATIONS;

D O I：

10.1103/PhysRevB.106.035141

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report results from spin trimer-based cluster quantum Monte Carlo simulations for the thermodynamic properties of two-dimensional frustrated quantum antiferromagnets that are composed of weakly coupled three-spin (trimer) clusters. In particular, we consider the spin-1/2 kagome lattice with a strong breathing distortion, and the triangle-square lattice model proposed previously for the cuprate La4Cu3MoO12. For both cases, we demonstrate that an appropriately chosen trimer-based computational basis allows us to significantly reduce the quantum Monte Carlo sign problem down to the low-temperature regime. Besides exploring the thermodynamic behavior for the triangle-square lattice model we also assess a mean-field theory based prediction for the onset of chiral order. For the breathing distorted kagome lattice model, we observe a robust two-peak structure in the specific heat, both in the quantum spin liquid and the lattice-nematic regimes.

引用

页数：10

共 40 条

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