Electronic Structure and Optical Spectrum of Thick HgTe Colloidal Nanoplatelets
Metadades
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INVESTIGACIONMetadades
Títol
Electronic Structure and Optical Spectrum of Thick HgTe Colloidal NanoplateletsData de publicació
2023-10-18Editor
American Chemical SocietyISSN
2330-4022Cita bibliogràfica
Climente, J.; Szafran, B. Electronic Structure and Optical Spectrum of Thick HgTe Colloidal Nanoplatelets. ACS Photonics 2023, 10, 3763-3771. https://doi.org/10.1021/acsphotonics.3c00999Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://pubs.acs.org/doi/full/10.1021/acsphotonics.3c00999?casa_token=pertFudSHl ...Versió
info:eu-repo/semantics/acceptedVersionParaules clau / Matèries
Resum
The electronic structure and optical transitions of HgTe nanoplatelets (NPLs) are calculated by means of an 8-band k·p Hamiltonian. We show that, for NPL thickness between the limits of strong confinement (∼1 nm) and ... [+]
The electronic structure and optical transitions of HgTe nanoplatelets (NPLs) are calculated by means of an 8-band k·p Hamiltonian. We show that, for NPL thickness between the limits of strong confinement (∼1 nm) and that of band gap collapse (∼6 nm), the photophysics is largely governed by the Γ6 – Γ8 band coupling. This leads to a nontrivial size dependence of the energy spectrum and charge distribution. A prominent effect is the formation of hybrid states in the conduction band, which evolve gradually from volume to surface localization as the thickness increases. This property enables controlled switching from direct to indirect exciton behavior without the need of using type-II heterostructures, which suppresses interband recombination. By contrast, intraband transition rates are enhanced. The small band gap of thick HgTe NPLs, together with the large binding energy of excitons, suggests that the excitonic insulator phase may be within reach. [-]
Publicat a
ACS Photonics, 2023, vol. 10, no 10Entitat finançadora
AGH University of Krakow | Ministerio de Ciencia e Innovación | Generalitat Valenciana
Identificador de l'entitat finançadora
http://dx.doi.org/10.13039/501100011033
Codi del projecte o subvenció
MCIN/PEICTI2021-2023/PID2021-128659NB-I00 | 22I235-CIPROM/2021/078
Drets d'accés
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/embargoedAccess
info:eu-repo/semantics/embargoedAccess
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