Fractional Corner Charge of Sodium Chloride

Recent developments in higherorder topological phases have revealed the relationship between nontrivial multipole moments in the bulk and the emergence of fractionally quantized charges at the boundary. Here, we put forth a proposal of the three-dimensional octupole insulator with fractionally quant...

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Bibliographic Details
Main Authors: Haruki Watanabe, Hoi Chun Po
Format: Article
Language:English
Published: American Physical Society 2021-12-01
Series:Physical Review X
Online Access:http://doi.org/10.1103/PhysRevX.11.041064