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Modelagem computacional de estruturas de poços quânticos semicondutores para dispositivos optoeletrônicos e spintrônicos
(Universidade Federal de São Carlos, 2014-01-29)
In the present thesis, we realize a computational modeling of semiconductor structures based on multiple quantum wells with filter barriers and on quantum wells with semiconductor diluted magnetic layers. We numerically ...
Contribuições ao estudo do transporte eletrônico em nanofios semicondutores : localização e estados de interface
(Universidade Federal de São Carlos, 2013-04-11)
In this work, we studied the influence of surface charges on the properties (especially electronic transport) of semiconductor nanowires and nanobelts via computer simulations and also they were compared to experimental ...
Optical and transport properties of p-i-n GaAs/AlAs resonant tunneling diode
(Universidade Federal de São Carlos, 2014-05-26)
In this thesis, we have investigated the optical and transport properties of a p-i-n GaAs-AlAs resonant tunneling diode (RTD). The possibility of controlling and significantly varying the density of carriers accumulated ...
Manipulação de spin em diodos de tunelamento ressonante não-magnéticos tipo-n
(Universidade Federal de São Carlos, 2010-04-01)
The aim of this work was to study the spin effects in non-magnetic asymmetric n-type resonant tunneling diodes (RTD). For this purpose, we have used transport and polarization resolved magneto-photoluminescence measurement ...
Caracterização das propriedades ópticas e de spin de poços quânticos de InGaAsN/GaAs
(Universidade Federal de São Carlos, 2015-03-30)
In this work, it was investigated the optical and magneto-optical properties of In- GaAsN/GaAs and InGaAs/GaAs double quantum wells. It was performed a systematic experimental study of photoluminescence (PL) as a function ...
Estudos de propriedades de muitos corpos em sistemas confinados : simulacões via Monte Carlo Quântico
(Universidade Federal de São Carlos, 2009-08-28)
The Quantum Monte Carlo Method has been constituted in a powerful ab-initio tool which can afford accurate estimates of the ground-state properties of quantum many-body systems. With this subject in mind, we first present ...
Estudos por espectroscopia Raman da heteroestrutura semicondutora InxGa1-xP/GaAs.
(Universidade Federal de São Carlos, 2005-03-24)
In this work, the technique Raman spectroscopy is used in order to study
InxGa1-xP films grown with different thickness on GaAs (001). Two sets of samples grown
by CBE (Chemical Beam Epitaxy) were analized: the first a ...
Estudo por espalhamento Raman dos efeitos de desordem química e estrutural no espectro de fônos do InSb indentado
(Universidade Federal de São Carlos, 2004-07-20)
Efeitos de localização de portadores em poços quânticos de GaBiAs/GaAs
(Universidade Federal de São Carlos, 2015-08-04)
In order to investigate optical and spin properties of GaBiAs / GaAs quantum
wells, we performed both photoluminescence and magneto-photoluminescence
spectroscopy measurements in three samples: 10 nm quantum wells with ...
Caracterização ótica de poços quânticos de GaMnAs
(Universidade Federal de São Carlos, 2007-09-12)
In this work, we have studied GaAs/AlAs/Ga1-xMnxAs quantum wells (QWs) with low Mn concentration ( 0 < x < 0,2%). The samples were grown by Molecular Beam Epitaxy (MBE) in high temperature (450 C). The growth conditions ...