Gauge-invariant optical selection rules for excitons
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arXiv
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| _version_ | 1866916359095451648 |
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| author | Fernando, Tharindu |
| author_facet | Fernando, Tharindu |
| contents | Presently, the optical selection rules for excitons under circularly-polarized light are manifestly gauge-dependent. Recently, Fernando et al. introduced a gauge-invariant, quantized interband index. This index may improve the topological classification of material excited states because it is intrinsically an inter-level quantity. In this work, we expand on this index to introduce its chiral formulation, and use it to make the selection rules gauge-invariant. We anticipate this development to strengthen the theory of quantum materials, especially two-dimensional semiconductor photophysics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_08311 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Gauge-invariant optical selection rules for excitons Fernando, Tharindu Mesoscale and Nanoscale Physics Optics Presently, the optical selection rules for excitons under circularly-polarized light are manifestly gauge-dependent. Recently, Fernando et al. introduced a gauge-invariant, quantized interband index. This index may improve the topological classification of material excited states because it is intrinsically an inter-level quantity. In this work, we expand on this index to introduce its chiral formulation, and use it to make the selection rules gauge-invariant. We anticipate this development to strengthen the theory of quantum materials, especially two-dimensional semiconductor photophysics. |
| title | Gauge-invariant optical selection rules for excitons |
| topic | Mesoscale and Nanoscale Physics Optics |
| url | https://arxiv.org/abs/2408.08311 |