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 for the undoped system, towards a uniform state with zero-flux. On top of the uniform-state a VBC of the Hastings-type is formed for low doping. The results are compared to exact diagonalization on small clusters. This agrees well.
@article{arxiv.1105.0581,
title = {Doping on the kagome lattice: A variational Monte-Carlo study of the $t-J$ model},
author = {Siegfried Guertler and Hartmut Monien},
journal= {arXiv preprint arXiv:1105.0581},
year = {2011}
}