Perfect one-dimensional interface states in a twisted stack of three-dimensional topological insulators
We theoretically study the electronic structure of interface states in twisted stacks of three-dimensional topological insulators. When the center of the surface Dirac cone is located at a midpoint of a side of the Brillouin zone boundary, we find that an array of nearly independent one-dimensional...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2022-12-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.4.043209 |
| _version_ | 1827285362266865664 |
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| author | Manato Fujimoto Takuto Kawakami Mikito Koshino |
| author_facet | Manato Fujimoto Takuto Kawakami Mikito Koshino |
| author_sort | Manato Fujimoto |
| collection | DOAJ |
| description | We theoretically study the electronic structure of interface states in twisted stacks of three-dimensional topological insulators. When the center of the surface Dirac cone is located at a midpoint of a side of the Brillouin zone boundary, we find that an array of nearly independent one-dimensional channels is formed by the interface hybridization of the surface states, even when the moiré pattern itself is isotropic. The two counterpropagating channels have opposite spin polarization, and they are robust against scattering by spin-independent impurities. The coupling between the parallel channels can be tuned by the twist angle. The unique one-dimensional states can be understood as effective Landau levels where the twist angle works as a fictitious magnetic field. |
| first_indexed | 2024-04-24T10:13:23Z |
| format | Article |
| id | doaj.art-e6182d44cda54fceaa07f01faf4a801f |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:13:23Z |
| publishDate | 2022-12-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-e6182d44cda54fceaa07f01faf4a801f2024-04-12T17:27:14ZengAmerican Physical SocietyPhysical Review Research2643-15642022-12-014404320910.1103/PhysRevResearch.4.043209Perfect one-dimensional interface states in a twisted stack of three-dimensional topological insulatorsManato FujimotoTakuto KawakamiMikito KoshinoWe theoretically study the electronic structure of interface states in twisted stacks of three-dimensional topological insulators. When the center of the surface Dirac cone is located at a midpoint of a side of the Brillouin zone boundary, we find that an array of nearly independent one-dimensional channels is formed by the interface hybridization of the surface states, even when the moiré pattern itself is isotropic. The two counterpropagating channels have opposite spin polarization, and they are robust against scattering by spin-independent impurities. The coupling between the parallel channels can be tuned by the twist angle. The unique one-dimensional states can be understood as effective Landau levels where the twist angle works as a fictitious magnetic field.http://doi.org/10.1103/PhysRevResearch.4.043209 |
| spellingShingle | Manato Fujimoto Takuto Kawakami Mikito Koshino Perfect one-dimensional interface states in a twisted stack of three-dimensional topological insulators Physical Review Research |
| title | Perfect one-dimensional interface states in a twisted stack of three-dimensional topological insulators |
| title_full | Perfect one-dimensional interface states in a twisted stack of three-dimensional topological insulators |
| title_fullStr | Perfect one-dimensional interface states in a twisted stack of three-dimensional topological insulators |
| title_full_unstemmed | Perfect one-dimensional interface states in a twisted stack of three-dimensional topological insulators |
| title_short | Perfect one-dimensional interface states in a twisted stack of three-dimensional topological insulators |
| title_sort | perfect one dimensional interface states in a twisted stack of three dimensional topological insulators |
| url | http://doi.org/10.1103/PhysRevResearch.4.043209 |
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