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cond-mat.mtrl-sci2025
Local expression of fractional corner charges in obstructed atomic insulators and relationship with the fractional disclination charges
Hidetoshi Wada, Shuichi Murakami
In obstructed atomic insulators, fractionally quantized charges appear at the corners of the crystals in the shapes of vertex-transitive polyhedra, and are given by the filling ano…
cond-mat.mtrl-sci2024
Theory of fractional corner charges in cylindrical crystal shapes
Hidetoshi Wada, Tiantian Zhang, Shuichi Murakami
Recent studies showed that topologically trivial insulators may have fractionally quantized corner charges due to the topological invariant called a filling anomaly. Such crystal s…
cond-mat.mtrl-sci2023
General corner charge formulas in various tetrahedral and cubic space groups
Hidetoshi Wada, Katsuaki Naito, Seishiro Ono +2
In some insulators, corner charges are fractionally quantized, due to the topological invariant called a filling anomaly. The previous theories of fractional corner charges have be…