@article{oai:tsukuba.repo.nii.ac.jp:00036393,
author = {苅宿, 俊風 and 初貝, 安弘 and Kariyado, Toshikaze and Hatsugai, Yasuhiro},
issue = {8},
journal = {Physical review B},
month = {Aug},
note = {Symmetry protected quantization of the Berry phase is discussed in relation to edge states. Assuming the existence of an adiabatic process that protects the quantization of the Berry phase, a nontrivial Berry phase γ∝2πρ (ρ is the local filling of particles) for the bulk suggests appearance of edge states with boundaries. We have applied this generic consideration for the Bloch states of a two-dimensional model with massless Dirac fermions where γ=±π/2 implies the edge states. The entanglement entropy is evaluated for the models and its relation to the bulk-edge correspondence of Dirac fermions is discussed as well.},
title = {Fractionally quantized Berry phase, adiabatic continuation, and edge states},
volume = {90},
year = {2014}
}