Combined spontaneous symmetry-breaking and symmetry-protected topological order from cluster charge interactions
The study of symmetry-protected topological states in the presence of electron correlations has recently aroused great interest as rich and exotic phenomena can emerge. Here we report a concrete example by employing a large-scale unbiased quantum Monte Carlo study of the Kane-Mele model with cluster...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-08-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.033291 |
| _version_ | 1827286039415226368 |
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| author | Chen Peng Rong-Qiang He Yuan-Yao He Zhong-Yi Lu |
| author_facet | Chen Peng Rong-Qiang He Yuan-Yao He Zhong-Yi Lu |
| author_sort | Chen Peng |
| collection | DOAJ |
| description | The study of symmetry-protected topological states in the presence of electron correlations has recently aroused great interest as rich and exotic phenomena can emerge. Here we report a concrete example by employing a 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 Kekulé valence bond order and shows that the spontaneous symmetry breaking is accompanied by an interaction-driven topological phase transition (TPT). This TPT features the appearance of zeros of a single-particle Green's function and gap closing in a spin channel rather than a single-particle excitation spectrum and thus has no mean-field correspondence. |
| first_indexed | 2024-04-24T10:24:48Z |
| format | Article |
| id | doaj.art-5f5b961e0fe149e89c2aebaef3bc6ac5 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:24:48Z |
| publishDate | 2020-08-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-5f5b961e0fe149e89c2aebaef3bc6ac52024-04-12T16:59:21ZengAmerican Physical SocietyPhysical Review Research2643-15642020-08-012303329110.1103/PhysRevResearch.2.033291Combined spontaneous symmetry-breaking and symmetry-protected topological order from cluster charge interactionsChen PengRong-Qiang HeYuan-Yao HeZhong-Yi LuThe study of symmetry-protected topological states in the presence of electron correlations has recently aroused great interest as rich and exotic phenomena can emerge. Here we report a concrete example by employing a 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 Kekulé valence bond order and shows that the spontaneous symmetry breaking is accompanied by an interaction-driven topological phase transition (TPT). This TPT features the appearance of zeros of a single-particle Green's function and gap closing in a spin channel rather than a single-particle excitation spectrum and thus has no mean-field correspondence.http://doi.org/10.1103/PhysRevResearch.2.033291 |
| spellingShingle | Chen Peng Rong-Qiang He Yuan-Yao He Zhong-Yi Lu Combined spontaneous symmetry-breaking and symmetry-protected topological order from cluster charge interactions Physical Review Research |
| title | Combined spontaneous symmetry-breaking and symmetry-protected topological order from cluster charge interactions |
| title_full | Combined spontaneous symmetry-breaking and symmetry-protected topological order from cluster charge interactions |
| title_fullStr | Combined spontaneous symmetry-breaking and symmetry-protected topological order from cluster charge interactions |
| title_full_unstemmed | Combined spontaneous symmetry-breaking and symmetry-protected topological order from cluster charge interactions |
| title_short | Combined spontaneous symmetry-breaking and symmetry-protected topological order from cluster charge interactions |
| title_sort | combined spontaneous symmetry breaking and symmetry protected topological order from cluster charge interactions |
| url | http://doi.org/10.1103/PhysRevResearch.2.033291 |
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