Transitions in Xenes between excitonic, topological and trivial insulator phases: Influence of screening, band dispersion and external electric field
Using a variational approach, the binding energies $E_b$ of the lowest bound excitons in Xenes under varying electric field are investigated. The internal exciton motion is described both by Dirac electron dispersion and in effective-mass approximation, while the screened electron-hole attraction is...
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| Format: | Article |
| Language: | English |
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SciPost
2023-07-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.15.1.025 |