Symmetry-enforced stable zeros in exciton wave functions constrain relative exciton-band topology and relative band topology in 1D and 2D inversion- and rotation-symmetric two-band systems.
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A theoretical study of screened plasmons in modulated graphene on metal reveals nontrivial topological bands with quantized geometric phase and tunable edge states in finite systems.
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Stable Wave-Function Zeros Indicate Exciton Topology
Symmetry-enforced stable zeros in exciton wave functions constrain relative exciton-band topology and relative band topology in 1D and 2D inversion- and rotation-symmetric two-band systems.
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Screened topological plasmons in graphene plasmonic crystals
A theoretical study of screened plasmons in modulated graphene on metal reveals nontrivial topological bands with quantized geometric phase and tunable edge states in finite systems.