Chiral $p$-wave superconductivity in twisted bilayer graphene from dynamical mean field theory
| Autor: | Pahlevanzadeh, B., Sahebsara, P., Sénéchal, D. |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | SciPost Phys. 11, 017 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.21468/SciPostPhys.11.1.017 |
| Popis: | We apply cluster dynamical mean field theory with an exact-diagonalization impurity solver to a Hubbard model for magic-angle twisted bilayer graphene, built on the tight-binding model proposed by Kang and Vafek (2018), which applies to the magic angle $1.30^\circ$. We find that triplet superconductivity with $p+ip$ symmetry is stabilized by CDMFT, as well as a subdominant singlet $d+id$ state. A minimum of the order parameter exists close to quarter-filling and three-quarter filling, as observed in experiments. Comment: 15 pages, 5 figures |
| Databáze: | arXiv |
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