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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2409.00274 |
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| _version_ | 1866910585992511488 |
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| author | Vezzosi, Andrea Bertoni, Andrea Gibertini, Marco Goldoni, Guido |
| author_facet | Vezzosi, Andrea Bertoni, Andrea Gibertini, Marco Goldoni, Guido |
| contents | We predict that in InAs/GaSb nanowires with an inverted band alignment a transverse electric field induces a collapse of the hybridization gap, and a semimetal phase occurs. We use a self-consistent k.p approach and an adapted Bernevig-Hughes-Zhang model to show that massless Dirac points result from exact cancellation between the kinetic electron-hole coupling and the field-controlled spin-orbit coupling. End states - mid-gap states localized at the extremes of a finite nanowire - are supported up to a critical field, but suddenly fade away as the system is driven through the semimetal phase, eventually evolving to trivial surface states, which expose a spin-orbit induced topological transition to the normal phase. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_00274 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spin-orbit control of Dirac points and end states in inverted gap nanowires Vezzosi, Andrea Bertoni, Andrea Gibertini, Marco Goldoni, Guido Mesoscale and Nanoscale Physics We predict that in InAs/GaSb nanowires with an inverted band alignment a transverse electric field induces a collapse of the hybridization gap, and a semimetal phase occurs. We use a self-consistent k.p approach and an adapted Bernevig-Hughes-Zhang model to show that massless Dirac points result from exact cancellation between the kinetic electron-hole coupling and the field-controlled spin-orbit coupling. End states - mid-gap states localized at the extremes of a finite nanowire - are supported up to a critical field, but suddenly fade away as the system is driven through the semimetal phase, eventually evolving to trivial surface states, which expose a spin-orbit induced topological transition to the normal phase. |
| title | Spin-orbit control of Dirac points and end states in inverted gap nanowires |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2409.00274 |