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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Monolayer CrCX3 and Janus Cr2C2S3Se3 compounds realize 2D higher-order topological insulator phases protected by C3 symmetry, hosting corner states with fractional charges even under spin-orbit coupling.
Rounded hard squares confined in a circle transition from a cross-shaped tetratic domain with four +1/4 disclinations to a six-domain partition with six +1/4 disclinations and one central -1/2 disclination as roundness increases.
citing papers explorer
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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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Higher-order topological insulators in two-dimensional antiferromagnetic and altermagnetic chromium-based group-IV chalcogenides
Monolayer CrCX3 and Janus Cr2C2S3Se3 compounds realize 2D higher-order topological insulator phases protected by C3 symmetry, hosting corner states with fractional charges even under spin-orbit coupling.
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Rounded hard squares confined in a circle
Rounded hard squares confined in a circle transition from a cross-shaped tetratic domain with four +1/4 disclinations to a six-domain partition with six +1/4 disclinations and one central -1/2 disclination as roundness increases.