Listar por autoría "68e68d60-58f9-43f5-ba58-3cc0379fa16a"
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Aharonov-Bohm oscillations and electron gas transitions in hexagonal core-shell nanowires with an axial magnetic field
Royo Valls, Miguel; Segarra, Carlos; Bertoni, Andrea; Goldoni, Guido; Planelles, Josep American Physical Society (2015)We use spin-density-functional theory within an envelope function approach to calculate electronic states in a GaAs/InAs core-shell nanowire pierced by an axial magnetic field. Our fully three-dimensional quantum modeling ... -
Excitons, Biexcitons, and Trions in CdSe Nanorods
Rajadell Viciano, Fernando; Climente, Juan I.; Planelles, Josep; Bertoni, Andrea American Chemical Society (2009)We calculate the recombination energies and probabilities of neutral excitons (X), singly charged excitons (X±), and biexcitons (XX) in CdSe quantum dots of variable length. For spherical dots the relative position of the ... -
Magnetophotoluminescence in GaAs/AlAs core-multishell nanowires: A theoretical investigation
Buscemi, Fabrizio; Royo Valls, Miguel; Bertoni, Andrea; Goldoni, Guido American Physical Society (2015)The magnetophotoluminescence in modulation doped core-multishell nanowires is predicted as a function of photoexcitation intensity in nonperturbative transverse magnetic fields. We use a self-consistent field approach within ... -
Multi-particle states of semiconductor hexagonal rings: Artificial benzene
Planelles, Josep; Ballester Caudet, Ana; Bertoni, Andrea American Institute of Physics (AIP) (2012)We present a theoretical and numerical investigation of correlated multi-electron states of hexagonal semiconductor rings. Both single-particle and correlated states show localization patterns in the six corners and ... -
Photoluminescence spectroscopy of trions in quantum dots: A theoretical description
Goldoni, Guido; Bertoni, Andrea; Climente, Juan I. American Physical Society (2008)We present a full configuration-interaction study of the spontaneous recombination of neutral and singly charged excitons trions in semiconductor quantum dots from weak- to strong-coupling regimes. We find that the ... -
Prediction of inelastic light scattering spectra from electronic collective excitations in GaAs/AlGaAs core-multishell nanowires
Royo Valls, Miguel; Bertoni, Andrea; Goldoni, Guido American Physical Society (2015)We predict inelastic light scattering spectra from electron collective excitations in a coaxial quantum well embedded in a core-multishell GaAs/AlGaAs nanowire. The complex composition, the hexagonal cross section, and ... -
Symmetries in the collective excitations of an electron gas in core-shell nanowires
Rollo Valls, Miguel; Bertoni, Andrea; Goldoni, Guido American Physical Society (2014)We study the collective excitations and inelastic light-scattering cross section of an electron gas confined in a GaAs/AlGaAs coaxial quantum well. These systems can be engineered in a core-multishell nanowire and inherit ... -
Unintentional High-Density p-Type Modulation Doping of a GaAs/AlAs Core–Multishell Nanowire
Jadczak, Joanna N.; Płochocka, Paulina; Mitioglu, Anatolie A.; Breslavetz, I.; Royo, Miquel; Bertoni, Andrea; Goldoni, Guido; Smoleński, Tomasz; Kossacki, Piotr; Kretinin, Andrey V.; Shtrikman, Hadas; Maude, Duncan Kennedy American Chemical Society (2014)Achieving significant doping in GaAs/AlAs core/shell nanowires (NWs) is of considerable technological importance but remains a challenge due to the amphoteric behavior of the dopant atoms. Here we show that placing a narrow ...