11 citations · 26 across the 4 of their papers we have counts for
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Chern numbers in two-dimensional systems with spiral boundary conditions
Masaaki Nakamura, Shohei Masuda
We discuss methods for calculating Chern numbers of two-dimensional lattice systems using spiral boundary conditions, which sweep all lattice sites in one-dimensional order. Specif…
Electronic polarization in non-Bloch band theory
Shohei Masuda, Masaaki Nakamura
Hermitian topological materials are characterized by the nontrivial relation between topological numbers and edge modes, i.e. the bulk-boundary correspondence. In non-Hermitian sys…
Relationship between the Electronic Polarization and the Winding Number in Non-Hermitian Systems
Shohei Masuda, Masaaki Nakamura
We discuss an extension of the Resta's electronic polarization to non-Hermitian systems with periodic boundary conditions. We introduce the ``electronic polarization'' as an expect…
Characterization of topological insulators based on the electronic polarization with spiral boundary conditions
Masaaki Nakamura, Shohei Masuda, Satoshi Nishimoto
We introduce the electronic polarization originally defined in one-dimensional lattice systems to characterize two-dimensional topological insulators. The main idea is to use spira…