Electric field induced tuning of electronic correlation in weakly confining quantum dots

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Publikace nespadá pod Fakultu sportovních studií, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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HUANG Huiying CSONTOSOVÁ Diana MANNA Santanu HUO Yongheng TROTTA Rinaldo RASTELLI Armando KLENOVSKÝ Petr

Rok publikování 2021
Druh Článek v odborném periodiku
Časopis / Zdroj Physical Review B
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://doi.org/10.1103/PhysRevB.104.165401
Doi http://dx.doi.org/10.1103/PhysRevB.104.165401
Klíčová slova electric correlation; quatnum dots; weakly confined systems; electric field; Stark shift; valence band mixing
Popis We conduct a combined experimental and theoretical study of the quantum confined Stark effect in GaAs/AlGaAs quantum dots obtained with the local droplet etching method. In the experiment, we probe the permanent electric dipole and polarizability of neutral and positively charged excitons weakly confined in GaAs quantum dots by measuring their light emission under the influence of a variable electric field applied along the growth direction. Calculations based on the configuration-interaction method show excellent quantitative agreement with the experiment and allow us to elucidate the role of Coulomb interactions among the confined particles and—even more importantly—of electronic correlation effects on the Stark shifts. Moreover, we show how the electric field alters properties such as built-in dipole, binding energy, and heavy-light hole mixing of multiparticle complexes in weakly confining systems, underlining the deficiencies of commonly used models for the quantum confined Stark effect.
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