Spin Berry phase in the Fermi-arc states
Physical Review B 84 巻 24 号
245415- 頁
2011 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
Spin Berry phase in the Fermi-arc states
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| 作成者 | |
| 収録物名 |
Physical Review B
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| 巻 | 84 |
| 号 | 24 |
| 開始ページ | 245415 |
| 抄録 |
An unusual electronic property of a Weyl semimetallic nanowire is revealed. Its band dispersion exhibits multiple subbands of partially flat dispersion, originating from the Fermi-arc states. Remarkably, the lowest energy flat subbands bear a finite size energy gap, implying that electrons in the Fermi-arc surface states are susceptible to the spin Berry phase. This is shown to be a consequence of spin-to-surface locking in the surface electronic states. We verify this behavior and the existence of the spin Berry phase in the low-energy effective theory of Fermi-arc surface states on a cylindrical nanowire by deriving the latter from a bulk Weyl Hamiltonian. We point out that in any surface state exhibiting a spin Berry phase π, a zero-energy bound state is formed along a magnetic flux tube of strength Φ0/2=hc/(2e). This effect is highlighted in a surfaceless bulk system pierced by a dislocation line, which shows a 1D chiral mode along the dislocation line.
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| NDC分類 |
物理学 [ 420 ]
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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
American Physical Society
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| 発行日 | 2011 |
| 権利情報 |
(c) 2011 American Physical Society
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| 出版タイプ | Version of Record（出版社版。早期公開を含む） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.84.245415
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.84.245415
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