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Competing Spin Liquid Phases in the S=$\frac{1}{2}$ Heisenberg Model on the Kagome Lattice
by Shenghan Jiang, Panjin Kim, Jung Hoon Han, Ying Ran
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Submission summary
Authors (as Contributors):  Shenghan Jiang 
Submission information  

Arxiv Link:  https://arxiv.org/abs/1610.02024v3 (pdf) 
Date accepted:  20190702 
Date submitted:  20190612 02:00 
Submitted by:  Jiang, Shenghan 
Submitted to:  SciPost Physics 
Ontological classification  

Academic field:  Physics 
Specialties: 

Approaches:  Theoretical, Computational 
Abstract
The properties of ground state of spin$\frac{1}{2}$ kagome antiferromagnetic Heisenberg (KAFH) model have attracted considerable interest in the past few decades, and recent numerical simulations reported a spin liquid phase. The nature of the spin liquid phase remains unclear. For instance, the interplay between symmetries and $Z_2$ topological order leads to different types of $Z_2$ spin liquid phases. In this paper, we develop a numerical simulation method based on symmetric projected entangledpair states (PEPS), which is generally applicable to strongly correlated model systems in two spatial dimensions. We then apply this method to study the nature of the ground state of the KAFH model. Our results are consistent with that the ground state is a $U(1)$ Dirac spin liquid rather than a $Z_2$ spin liquid.
Published as SciPost Phys. 7, 006 (2019)
Author comments upon resubmission
List of changes
1. add fitting parameters on Fig. 4
2. add another appendix performing robustness analysis.