3 papers
cond-mat.str-el2026
Two-Body Solution and Instabilities along Streda Lines in Moire Flat Bands
Guopeng Xu, Chunli Huang
Moire minibands in twisted homobilayer semiconductors can, under suitable approximations, be modeled as a pair of Landau levels with opposite Chern numbers. This provides a minimal…
cond-mat.str-el2025
Localized Excitons and Landau-Level Mixing in Time-Reversal Symmetric Pairs of Chern Bands
Guopeng Xu, Nemin Wei, Inti Sodemann Villadiego +1
We study Landau-level mixing in a time-reversal-symmetric Hamiltonian composed of two sets of Landau levels with opposite magnetic field, relevant to moiré minibands in twisted ho…
cond-mat.mes-hall2024
Influence of the Dirac Sea on Phase Transitions in Monolayer Graphene under Strong Magnetic Fields
Guopeng Xu, Chunli Huang
Recent scanning tunneling microscopy experiments have found Kekulé-Distorted (KD) ordering in graphene subjected to strong magnetic fields, a departure from the antiferromagnetic…