Abstract
A fully self-consistent treatment for gap generation and Coulomb screening in excitonic insulators is presented. The method is based on the equations of motion for the relevant dynamical variables combined with a variational approach. Applying the theory for a model system of bilayer graphene, an excitonic ground state with a gap exceeding 10 meV is predicted.
| Original language | English |
|---|---|
| Journal | Physical review B: Condensed matter and materials physics |
| Volume | 87 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 2013 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- graphene
- 2D materials
- many-body theory
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