In the Hubbard model for twisted bilayer cuprates at U/t=3.85, the Chern number is ±8 in the electron-doped regime and 0 in the hole-doped regime, confirmed by edge-state analysis.
Potthoff, Self-energy-functional approach to systems of correlated electrons, The European Physical Journal B - Condensed Matter32, 429 (2003)
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Topological superconductivity in a Hubbard model for twisted bilayer cuprates
In the Hubbard model for twisted bilayer cuprates at U/t=3.85, the Chern number is ±8 in the electron-doped regime and 0 in the hole-doped regime, confirmed by edge-state analysis.