Local vs non-local correlation effects in interacting quantum spin Hall insulators.
2021
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.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
58
References
0
Citations
NaN
KQI