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29 March 2024 |
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Article overview
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Combined spontaneous symmetry-breaking and symmetry-protected topological order from cluster charge interaction | Chen Peng
; Rong-Qiang He
; Yuan-Yao He
; Zhong-Yi Lu
; | Date: |
6 Sep 2019 | Abstract: | The study of symmetry-protected topological states in presence of electron
correlations has recently aroused great interest as rich and exotic phenomena
can emerge. Here, we report a concrete example by employing large-scale
unbiased quantum Monte Carlo study of the Kane-Mele model with cluster charge
interactions. The ground-state phase diagram for the model at half filling is
established. Our simulation identifies the coexistence of a symmetry-protected
topological order with a symmetry-breaking Kekul$acute{e}$ valence bond order
and shows that the spontaneous symmetry-breaking is accompanied by an
interaction-driven topological phase transition (TPT). This TPT features
appearance of zeros of single-particle Green’s function and gap closing in spin
channel rather than single-particle excitation spectrum, and thus has no
mean-field correspondence. | Source: | arXiv, 1909.3025 | Services: | Forum | Review | PDF | Favorites |
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