Berry flux in double-well dispersions can drive chiral excitonic condensates with evolving angular momentum channels, and trigonal warping in multilayer graphene leads to mixed angular momentum ground states.
Vanderbilt, Berry phases in electronic structure the- ory: Electric polarization, orbital magnetization and topological insulators (2018)
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Valley polarization of chiral excitonic bound states induced by band geometry
Berry flux in double-well dispersions can drive chiral excitonic condensates with evolving angular momentum channels, and trigonal warping in multilayer graphene leads to mixed angular momentum ground states.