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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 |
|---|---|---|
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 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | application/pdf | |||||
| 形態 | ||||||
| 3346843 bytes | ||||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 日本十進分類法 | ||||||
| 主題Scheme | NDC | |||||
| 主題 | 415 | |||||
| 出版者 | ||||||
| 出版者 | American Physical Society | |||||
| 資源タイプ | ||||||
| 内容記述タイプ | Other | |||||
| 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 | ||||||
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| text | ||||||
| 資源タイプ・ローカル表示コード | ||||||
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| URL | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | http://prb.aps.org/abstract/PRB/v86/i16/e165430 | |||||
