Quantum Many-Body Principles of Localized-State Ensemble Luminescence
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866917256696430592 |
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| author | Fan, Xinye Xu, Shijie |
| author_facet | Fan, Xinye Xu, Shijie |
| contents | Localized electron states induced by various disorders,including defects and impurities,usually exist in solids.Their optical properties,especially their luminescence properties,are of both scientific and technological significance.But a microscopic theory has not yet been established for such localized-state ensemble (LSE) luminescence.In this Letter,we attempt to fill this void via developing a quantum many-body (MB) luminescence theory taking into account both electron-phonon (e-p) and electron-electron (e-e) interactions.By using the developed MB-LSE theory,abnormal thermal behaviors such as redshift and subsequent blueshift of peak position,narrowing and succeeding broadening of linewidth,decline in intensity,and variation in lifetime can be quantitatively interpreted.The roles of electron-phonon and electron-electron interactions in the variable-temperature LSE luminescence are thus elucidated. Within the framework of the MB-LSE theory, moreover, Varshni's empirical formula for bandgap temperature dependence and Huang-Rhys factor for e-p coupling are further derived and discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_07406 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Quantum Many-Body Principles of Localized-State Ensemble Luminescence Fan, Xinye Xu, Shijie Quantum Physics Localized electron states induced by various disorders,including defects and impurities,usually exist in solids.Their optical properties,especially their luminescence properties,are of both scientific and technological significance.But a microscopic theory has not yet been established for such localized-state ensemble (LSE) luminescence.In this Letter,we attempt to fill this void via developing a quantum many-body (MB) luminescence theory taking into account both electron-phonon (e-p) and electron-electron (e-e) interactions.By using the developed MB-LSE theory,abnormal thermal behaviors such as redshift and subsequent blueshift of peak position,narrowing and succeeding broadening of linewidth,decline in intensity,and variation in lifetime can be quantitatively interpreted.The roles of electron-phonon and electron-electron interactions in the variable-temperature LSE luminescence are thus elucidated. Within the framework of the MB-LSE theory, moreover, Varshni's empirical formula for bandgap temperature dependence and Huang-Rhys factor for e-p coupling are further derived and discussed. |
| title | Quantum Many-Body Principles of Localized-State Ensemble Luminescence |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2602.07406 |