Listar por autoría "a0f27e5e-5835-40c1-9a9b-762596342497"

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    • openAccess   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 ...

    • openAccess   Charge control in laterally coupled double quantum dots 

      Muñoz Matutano, G.; Royo Valls, Miguel; Climente, Juan I.; Canet Ferrer, J.; Fuster, D.; Alonso-Jordá, Pedro; Fernández Martínez, Iván; Martínez-Pastor, Juan P.; González Diez, Yolanda; González Sotos, Luisa; Briones, Fernando; Alen Millán, B. American Physical Society (2011-07-27)
      We investigate the electronic and optical properties of InAs double quantum dots grown on GaAs (001) and laterally aligned along the [110] crystal direction. The emission spectrum has been investigated as a function of a ...

    • openAccess   Correlation in narrow nanorods: a variational potential–configuration interaction scheme 

      Planelles, Josep; Climente, Juan I.; Royo Valls, Miguel; Movilla, Jose L. Institute of Physics (2009)
      Abstract. Full configuration interaction calculations of two electrons in narrow semiconductor nanorods are carried out employing different orbital basis sets. It is shown that the usual configurations built from ...

    • openAccess   Diamagnetic and paramagnetic shifts in self-assembled InAs lateral quantum dot molecules 

      Zhou, Xinran R.; Royo Valls, Miguel; Liu, Weiwen; Lee, Jihoon H.; Salamo, Gregory J.; Climente, Juan I.; Doty, Matthew F. American Physical Society (2015)
      We uncover the underlying physics that explains the energy shifts of discrete states of individual InAs lateral quantum dot molecules (LQDMs) as a function of magnetic fields applied in the Faraday geometry. We observe that ...

    • openAccess   Dielectric confinement of excitons in type-I and type-II semiconductor nanorods 

      Royo Valls, Miguel; Climente, Juan I.; Movilla, Jose L.; Planelles, Josep Institute of Physics (2011-01-12)
      We theoretically study the effect of the dielectric environment on the exciton ground state of CdSe and CdTe/CdSe/CdTe nanorods. We show that insulating environments enhance the exciton recombination rate and blueshift the ...

    • openAccess   Dielectric control of spin in semiconductor spherical quantum dots 

      Royo Valls, Miguel; Rajadell Viciano, Fernando; Planelles, Josep American Institute of Physics (2008)
      The ground state electronic configuration of semiconductor spherical quantum dots populated with different numbers of excess electrons, for different radii and dielectric constants of the embedding medium is calculated ...

    • openAccess   Emission spectrum of quasiresonant laterally coupled quantum dots 

      Royo Valls, Miguel; Climente, Juan I.; Planelles, Josep American Physical Society (2011-12-21)
      We calculate the emission spectrum of neutral and charged excitons in a pair of laterally coupled InGaAs quantum dots with nearly degenerate energy levels. As the interdot distance decreases, a number of changes take place ...

    • openAccess   From quantum dots to quantum wires: electronic structure of semiconductor nanorods 

      Planelles, Josep; Royo Valls, Miguel; Ballester Caudet, Ana; Pi, Martí American Physical Society (2009)
      The transition bridge between zero-dimensional quantum dots and one-dimensional quantum wires is explored theoretically by means of the construction of the addition energy spectra of nanorods with different lengths. Spin ...

    • openAccess   Isospin phases of vertically coupled double quantum rings under the influence 

      Planelles, Josep; Pi, Martí; Barranco, Manuel; Malet, Francesc; Royo Valls, Miguel American Physical Society (2008)
      Vertically coupled double quantum rings submitted to a perpendicular magnetic field B are addressed within the local spin-density-functional theory. We describe the structure of quantum ring molecules containing up to 40 ...

    • openAccess   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 ...

    • openAccess   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 ...

    • openAccess   Strain in free standing CdSe/CdS core-shell nanorods 

      Rajadell Viciano, Fernando; Planelles, Josep; Royo Valls, Miguel American Institute of Physics (AIP) (2012)
      The main characteristic strain trends in free-standing II–VI wurtzite semiconductor nanorods coated with a few-monolayers shell are reported. Calculations for different aspect ratios and shell thicknesses show that these ...

    • openAccess   Strong configuration mixing due to dielectric confinement in semiconductor nanorods 

      Climente, Juan I.; Royo Valls, Miguel; Movilla, Jose L.; Planelles, Josep American Physical Society (2009)
      The interaction between electron-electron and electron-hole pairs in semiconductor nanorods embedded in dielectric media is investigated using a configuration-interaction method. Contrary to spherical quantum dots of similar ...