Edge States of Bi Nanoribbons on Bi Substrates: First-Principles Density Functional Study
スポンサーリンク
概要
- 論文の詳細を見る
By using fully relativistic first-principles calculations, we study edge states of the Bi(001) nanoribbons. We find that freestanding zigzag bismuth nanoribbons (ZBNRs) have two spin degenerate bands around the Fermi energy, whose wave functions are localized at the edges. The wave functions are sharply localized at the edges at the zone boundary and become delocalized as the wave number decreases. In the case of the ZBNR on Bi substrates, the inversion symmetry is broken. As a result, the spin degenerate bands split and thus the density of states near the Fermi level has broad distributions; therefore, the electronic structures are expected to be stabilized. Because of the edge state near the Fermi energy, conduction along the edge lines is expected. However, the topological insulator predicted in the case of the freestanding ZBNR is not achieved in the case of the ZBNR on Bi substrates.
- 2012-02-25
著者
-
Yaginuma Shin
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
-
Ishii Fumiyuki
Faculty of Mathematics and Physics, Institute of Science and Engineering, Kanazawa University, Kanazawa 920-1192, Japan
-
Saito Mineo
Faculty of Mathematics and Physics, Institute of Science and Engineering, Kanazawa University, Kanazawa 920-1192, Japan
-
Nagao Tadaaki
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
-
Kotaka Hiroki
Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan
関連論文
- Magnetism in dehydrogenated armchair graphene nanoribbon
- Edge States of Bi Nanoribbons on Bi Substrates: First-Principles Density Functional Study
- Rashba Effect on the Structure of the Bi One-Bilayer Film: Fully Relativistic First-Principles Calculation
- Rashba Effect on the Structure of the Bi One-Bilayer Film : Fully Relativistic First-Principles Calculation