Binding energy of polaronic trions and biexcitons in CsPbBr$_3$ nanocrystals
Fuente:
arXiv
Salvato in:
| Autori principali: | , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2024
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866908303824519168 |
|---|---|
| author | Movilla, Jose L. Planelles, Josep Climente, Juan I. |
| author_facet | Movilla, Jose L. Planelles, Josep Climente, Juan I. |
| contents | The effect of polaron formation on the ground state of excitons, trions and biexcitons confined in CsPbBr$_3$ nanocrystals is studied in the framework of effective mass Hamiltonians, using a Haken-like (Bajaj) potential for carrier-phonon coupling. The binding energy of trions agrees well with that observed in experiments, with position-dependent dielectric screening playing a significant role. For biexcitons, however, neither polaronic effects, nor dielectric confinement, nor electronic correlations -- here accounted for with a variational Quantum Monte Carlo method -- suffice to explain the large binding energies reported by single nanocrystal spectroscopy experiments. This result reinforces the hypothesis that biexcitons polarize the perovskite lattice differently from excitons and trions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_09526 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Binding energy of polaronic trions and biexcitons in CsPbBr$_3$ nanocrystals Movilla, Jose L. Planelles, Josep Climente, Juan I. Mesoscale and Nanoscale Physics The effect of polaron formation on the ground state of excitons, trions and biexcitons confined in CsPbBr$_3$ nanocrystals is studied in the framework of effective mass Hamiltonians, using a Haken-like (Bajaj) potential for carrier-phonon coupling. The binding energy of trions agrees well with that observed in experiments, with position-dependent dielectric screening playing a significant role. For biexcitons, however, neither polaronic effects, nor dielectric confinement, nor electronic correlations -- here accounted for with a variational Quantum Monte Carlo method -- suffice to explain the large binding energies reported by single nanocrystal spectroscopy experiments. This result reinforces the hypothesis that biexcitons polarize the perovskite lattice differently from excitons and trions. |
| title | Binding energy of polaronic trions and biexcitons in CsPbBr$_3$ nanocrystals |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2411.09526 |