@misc{oai:tsukuba.repo.nii.ac.jp:00016923,
 author = {Ryu, Shinsei and 初貝, 安弘 and HATSUGAI, Yasuhiro},
 month = {May},
 note = {We propose a criterion to determine the existence of zero-energy edge states for a class of particle–hole symmetric systems. A loop is assigned for each system, and its topology and a symmetry play an essential role. Applications to d-wave superconductors are demonstrated.},
 title = {Zero-energy edge states and their origin in particle–hole symmetric systems: symmetry and topology},
 year = {2003},
 yomi = {ハツガイ, ヤスヒロ}
}