Doping on the kagome lattice: A variational Monte Carlo study of the t-J model

被引：12

作者：

Guertler, Siegfried ^{[1
]}

Monien, Hartmut ^{[1
]}

机构：

[1] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 17期

关键词：

ANTIFERROMAGNET; SYSTEMS; STATE;

D O I：

10.1103/PhysRevB.84.174409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study doping on the kagome lattice by exploring the t-J model with variational Monte-Carlo. We use a number of Gutzwiller projected spin-liquid and valence-bond-crystal states and compare their energies at several system sizes. We find that introducing mobile holes drives the system away from the spin-liquid state proposed by Ran et al. [Y. Ran, M. Hermele, P. A. Lee, and X. G. Wen, Phys. Rev. Lett. 98, 117205 ( 2007)] for the undoped system, toward a uniform state with zero flux. On top of the uniform state a valence-bond crystal of the Hastings type is formed for low doping. The results are compared and agree well with exact diagonalization on small clusters.

引用

页数：4

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