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 variational approach produces a nonlocal spin-dependent effective potential between two ground-state Wannier excitons that reduces to the local Heitler-London hydrogen result for heavy holes and yields van der Waals interactions when excited states are included.
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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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Variational and field-theoretical approach to exciton-exciton interactions and biexcitons in semiconductors
A variational approach produces a nonlocal spin-dependent effective potential between two ground-state Wannier excitons that reduces to the local Heitler-London hydrogen result for heavy holes and yields van der Waals interactions when excited states are included.