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| Main Author: | |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2410.20251 |
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| _version_ | 1866912713923362816 |
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| author | Chattopadhyay, Anwesha |
| author_facet | Chattopadhyay, Anwesha |
| contents | We study a one-dimensional chain of identical atoms with two electronic orbitals and two electrons per atom, subject to an external oscillating pressure that periodically modulates the lattice spacing. This leads to time-dependent intra- and inter-orbital hopping amplitudes. In the tight-binding limit with weak inter-orbital hopping, the system exhibits two electronic bands separated by an oscillating indirect band-gap. By tuning hopping amplitudes and orbital energies, a periodic metal-insulator transition emerges in the half-filled system. When the frequency of this transition matches that of an external alternating electric field, the system undergoes half-wave rectification: it behaves as a conductor during one half-cycle and as an insulator during the other. This dynamic switching enables directional current flow and remains robust under small to intermediate onsite electron-electron interactions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_20251 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Rectification from band gap oscillation Chattopadhyay, Anwesha Mesoscale and Nanoscale Physics We study a one-dimensional chain of identical atoms with two electronic orbitals and two electrons per atom, subject to an external oscillating pressure that periodically modulates the lattice spacing. This leads to time-dependent intra- and inter-orbital hopping amplitudes. In the tight-binding limit with weak inter-orbital hopping, the system exhibits two electronic bands separated by an oscillating indirect band-gap. By tuning hopping amplitudes and orbital energies, a periodic metal-insulator transition emerges in the half-filled system. When the frequency of this transition matches that of an external alternating electric field, the system undergoes half-wave rectification: it behaves as a conductor during one half-cycle and as an insulator during the other. This dynamic switching enables directional current flow and remains robust under small to intermediate onsite electron-electron interactions. |
| title | Rectification from band gap oscillation |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2410.20251 |