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: | , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-05-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.023242 |
| Summary: | 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. |
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| ISSN: | 2643-1564 |