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Merging Dirac points and topological phase transitions in the tight-binding model on the generalized honeycomb lattice
http://hdl.handle.net/2298/25961
http://hdl.handle.net/2298/25961291c7739-c154-48a3-946b-ac1c2e0e0b2c
名前 / ファイル | ライセンス | アクション |
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PhysRevB.86.165430.pdf (3.3 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2012-11-30 | |||||
タイトル | ||||||
タイトル | Merging Dirac points and topological phase transitions in the tight-binding model on the generalized honeycomb lattice | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ | journal article | |||||
著者 |
Hasegawa, Yasumasa
× Hasegawa, Yasumasa× Kishigi, Keita |
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別言語の著者 |
長谷川, 泰正
× 長谷川, 泰正× 岸木, 敬太 |
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内容記述 | ||||||
内容記述 | Moving, merging, and annihilating Dirac points are studied theoretically in the tight-binding model on honeycomb lattice with up-to third-nearest-neighbor hoppings.We obtain a rich phase diagram of the topological phase transitions in the parameter space of direction-dependent hoppings. We obtain the conditions for the three Dirac points to merge and for the tricritical points. We find that only very small third-nearest-neighbor hoppings are enough for the existence of the merging of three-Dirac-points and the tricritical points, if the system is sufficiently anisotropic. The density of states is obtained to be D(ε) ∝ |ε|1/3 when three Dirac points merge, and D(ε) ∝ |ε|1/4 at the tricritical points. It is possible to realize these topological phase transitions in the ultracold atoms on the optical lattice, strained monolayer graphene, or strained bilayer graphene. |
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書誌情報 |
Physical Review B : Condensed Matter and Materials Physics 巻 86, 号 16, p. 165430-1-165430-18, 発行年 2012-10-18 |
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ISSN | ||||||
収録物識別子 | 10980121 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
関連識別子 | 10.1103/PhysRevB.86.165430 | |||||
権利 | ||||||
権利情報 | © 2012 American Physical Society | |||||
フォーマット | ||||||
内容記述 | application/pdf | |||||
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3346843 bytes | ||||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
日本十進分類法 | ||||||
主題 | 415 | |||||
出版者 | ||||||
出版者 | American Physical Society | |||||
資源タイプ | ||||||
内容記述 | 論文(Article) | |||||
資源タイプ・ローカル | ||||||
雑誌掲載論文 | ||||||
資源タイプ・NII | ||||||
Journal Article | ||||||
資源タイプ・DCMI | ||||||
text | ||||||
資源タイプ・ローカル表示コード | ||||||
01 | ||||||
URL | ||||||
内容記述 | http://prb.aps.org/abstract/PRB/v86/i16/e165430 |