Engineering edge-state currents at the interface between narrow ribbons of two-dimensional topological insulators
We consider a junction between two semi-infinite narrow ribbons of a two-dimensional (2D) topological insulator (TI) and calculate the electron current through the interface carried by one-dimensional (1D) edge states formed in the bulk band gap. In addition to an abrupt interface between ribbons, w...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-05-01
|
| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.023242 |
| _version_ | 1797211435512627200 |
|---|---|
| author | H. Ishida A. Liebsch |
| author_facet | H. Ishida A. Liebsch |
| author_sort | H. Ishida |
| collection | DOAJ |
| description | We consider a junction between two semi-infinite narrow ribbons of a two-dimensional (2D) topological insulator (TI) and calculate the electron current through the interface carried by one-dimensional (1D) edge states formed in the bulk band gap. In addition to an abrupt interface between ribbons, we also consider a configuration where one or two rectangular islands of finite length are sandwiched between these ribbons. We demonstrate that it is feasible to create “current-on” and “current-off” states by modifying the energy dispersion of 1D interface edge states and the resonant levels localized at the boundary of the island regions. |
| first_indexed | 2024-04-24T10:26:27Z |
| format | Article |
| id | doaj.art-e330e6db1bdb46e29e35ff8bed657fb2 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:26:27Z |
| publishDate | 2020-05-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-e330e6db1bdb46e29e35ff8bed657fb22024-04-12T16:54:37ZengAmerican Physical SocietyPhysical Review Research2643-15642020-05-012202324210.1103/PhysRevResearch.2.023242Engineering edge-state currents at the interface between narrow ribbons of two-dimensional topological insulatorsH. IshidaA. LiebschWe consider a junction between two semi-infinite narrow ribbons of a two-dimensional (2D) topological insulator (TI) and calculate the electron current through the interface carried by one-dimensional (1D) edge states formed in the bulk band gap. In addition to an abrupt interface between ribbons, we also consider a configuration where one or two rectangular islands of finite length are sandwiched between these ribbons. We demonstrate that it is feasible to create “current-on” and “current-off” states by modifying the energy dispersion of 1D interface edge states and the resonant levels localized at the boundary of the island regions.http://doi.org/10.1103/PhysRevResearch.2.023242 |
| spellingShingle | H. Ishida A. Liebsch Engineering edge-state currents at the interface between narrow ribbons of two-dimensional topological insulators Physical Review Research |
| title | Engineering edge-state currents at the interface between narrow ribbons of two-dimensional topological insulators |
| title_full | Engineering edge-state currents at the interface between narrow ribbons of two-dimensional topological insulators |
| title_fullStr | Engineering edge-state currents at the interface between narrow ribbons of two-dimensional topological insulators |
| title_full_unstemmed | Engineering edge-state currents at the interface between narrow ribbons of two-dimensional topological insulators |
| title_short | Engineering edge-state currents at the interface between narrow ribbons of two-dimensional topological insulators |
| title_sort | engineering edge state currents at the interface between narrow ribbons of two dimensional topological insulators |
| url | http://doi.org/10.1103/PhysRevResearch.2.023242 |
| work_keys_str_mv | AT hishida engineeringedgestatecurrentsattheinterfacebetweennarrowribbonsoftwodimensionaltopologicalinsulators AT aliebsch engineeringedgestatecurrentsattheinterfacebetweennarrowribbonsoftwodimensionaltopologicalinsulators |