Local vs non-local correlation effects in interacting quantum spin Hall insulators
| Autor: | Crippa, L., Amaricci, A., Adler, S., Sangiovanni, G., Capone, M. |
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| Rok vydání: | 2021 |
| Předmět: |
Quantum Physics
Strongly Correlated Electrons (cond-mat.str-el) quantum spin Hall FOS: Physical sciences 01 natural sciences 010305 fluids & plasmas 3. Good health Settore FIS/03 - Fisica della Materia Condensed Matter - Strongly Correlated Electrons 0103 physical sciences strongly correlated systems 010306 general physics Quantum Physics (quant-ph) Weyl semimetal strongly correlated systems quantum spin Hall Weyl semimetal |
| DOI: | 10.48550/arxiv.2110.05364 |
| Popis: | The impact of Coulomb interaction on the electronic properties of a quantum spin-Hall insulator is studied using quantum cluster methods, disentangling local from non-local effects. We identify different regimes, according to the value of the bare mass term, characterized by drastically different self-energy contributions. For small mass, non-local correlations start to be important and eventually dominate over local ones when getting close enough to the zero-mass semi-metallic line. For intermediate and large mass, local correlation effects outweigh non-local corrections, leading to a first-order topological phase transition, in agreement with previous predictions. Comment: 11 pages, 9 figures |
| Databáze: | OpenAIRE |
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