Shell filling and paramagnetism in few-electron colloidal nanoplatelets
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Title
Shell filling and paramagnetism in few-electron colloidal nanoplateletsDate
2022-08-05Publisher
American Physical SocietyISSN
0031-9007; 1079-7114Bibliographic citation
Llusar, J., & Climente, J. I. (2022). Shell Filling and Paramagnetism in Few-Electron Colloidal Nanoplatelets. Physical Review Letters, 129(6)Type
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Abstract
Colloidal semiconductor nanoplatelets are excellent optical emitters, which combine a quasi-2D structure with strong in-plane Coulomb interactions. Here, we go beyond the photoexcitation regime and investigate theor ... [+]
Colloidal semiconductor nanoplatelets are excellent optical emitters, which combine a quasi-2D structure with strong in-plane Coulomb interactions. Here, we go beyond the photoexcitation regime and investigate theoretically the effect of charging nanoplatelets with a few interacting fermions (electrons or holes). This introduces severe Coulomb repulsions in the system, enhanced by the inherent dielectric confinement. We predict strong electronic correlations and electron-electron exchange energies (over 20 meV) in type-I (CdSe/CdS) and type-II (CdSe/CdTe) nanoplatetets, which give rise to characteristic physical phenomena. These include shell filling spectra deviating from the Aufbau principle, large addition energies which permit deterministic control of the number of charges at room temperature and paramagnetic electron spin configuration activated at cryogenic temperatures. [-]
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Physical Review Letters, Vol. 129, Iss. 6 (2022)Funder Name
Ministerio de Ciencia e Innovación (MICINN) | Universitat Jaume I
Project code
PID2021-128659NB-I00 | UJI-B2021-06
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info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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