Effect of disorder on Berry curvature and quantum metric in two-band gapped graphene
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866929565817896960 |
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| author | Liu, Ze Zhang, Zhi-Fan Zhu, Zhen-Gang Su, Gang |
| author_facet | Liu, Ze Zhang, Zhi-Fan Zhu, Zhen-Gang Su, Gang |
| contents | The geometric properties of parameter space are mostly described by Berry curvature and quantum metric, which are the imaginary and real part of quantum geometric tensor, respectively. In this work, we calculate the dressed Berry curvature and quantum metric containing eight Feynman diagrams, which are proportional to the leading-order of the concentration of impurities. For a two-band gapped graphene model, we find the disorder does not break the original symmetry but decrease (increase) the absolute value of Berry curvature and quantum metric in conduction (valence) band. We show how impurities affect the Berry curvature and quantum metric, deepening our understanding of the impurity effect on the electron transport properties in two-band gapped graphene. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_13275 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Effect of disorder on Berry curvature and quantum metric in two-band gapped graphene Liu, Ze Zhang, Zhi-Fan Zhu, Zhen-Gang Su, Gang Mesoscale and Nanoscale Physics Materials Science The geometric properties of parameter space are mostly described by Berry curvature and quantum metric, which are the imaginary and real part of quantum geometric tensor, respectively. In this work, we calculate the dressed Berry curvature and quantum metric containing eight Feynman diagrams, which are proportional to the leading-order of the concentration of impurities. For a two-band gapped graphene model, we find the disorder does not break the original symmetry but decrease (increase) the absolute value of Berry curvature and quantum metric in conduction (valence) band. We show how impurities affect the Berry curvature and quantum metric, deepening our understanding of the impurity effect on the electron transport properties in two-band gapped graphene. |
| title | Effect of disorder on Berry curvature and quantum metric in two-band gapped graphene |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2404.13275 |