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Redes de osciladores dissipativos: o modelo duplicado de Caldeira-Leggett, transferência quase-perfeita de estados e recoerência
(Universidade Federal de São Carlos, 2010-02-25)
In this work we treat firstly what we call the double Caldeira-Leggett model, which consists on the approach to the dynamics of two dissipative harmonic oscillators via Feynman-Vernon theory. We derived and solved the ...
Fabricação e caracterização elétrica de dispositivos orgânicos emissores de luz derivados de poli-p(fenilene vinilene) (PPV)
(Universidade Federal de São Carlos, 2010-03-16)
Molecularly doped polymers have been widely studied in recent years due to their electronic and optical properties, and application in the manufacture of opto-electronic devices, light emitting diodes (LED) and others. ...
Estudos de efeitos de spin em diodos de tunelamento ressonante do tipo-p
(Universidade Federal de São Carlos, 2010-03-26)
The aim of this work was to complement the studies of the mechanisms of control of the degree of circular polarization of emission from resonant tunneling diodes p-type (RTD) by analyzing the optical properties and transport ...
Estrutura dos diagramas de fases de um modelo de filmes finos via métodos de Monte Carlo
(Universidade Federal de São Carlos, 2010-12-17)
Multilayer systems consisting of magnetic layers of heterostructures can have a variety of magnetic phases - those dependent on factors such as the exchange parameters, the geometry of the material, the temperature T to ...
Caracterização magnética do compósito multiferróico (1-x)Pb(Mg1/3Nb2/3)-xPbTiO3/NiFe2O4
(Universidade Federal de São Carlos, 2010-03-22)
In this work we studied the magnetic properties of nickel ferrite and the (1-x)Pb(Mg1/3Nb2/3)-xPbTiO3/NiFe2O4 (PMN-PT/NFO) multifferroic composite syntherized in different temperatures. The magnetization, magnetostriction ...
Geração e proteção de estados comprimidos do campo e estados atômicos emaranhados em cavidades ópticas
(Universidade Federal de São Carlos, 2010-03-03)
In this work we investigated the engineering of interactions and reservoirs in the context of Cavity Quantum Electrodynamics. The investigated system consists of two identical three-level atoms trapped in two distinct ...
Estudo de efeitos quânticos nas propriedades eletrônicas de nanofios semicondutores
(Universidade Federal de São Carlos, 2010-03-02)
The growth and characterization of semiconductor nanowires systems have attracted increasing interest due to their potential technological application, like, photo-detectors, optoelectronic devices and their promising ...
Resposta magnética de supercondutores estruturados: dependência com a granulometria
(Universidade Federal de São Carlos, 2010-02-26)
The maximum critical current that a granular superconductor is able to transport is, in general, limited by the critical current of the weak-links (WLs), which connect neighbor grains. For samples whose intergranular ...
Polarização de spin em heteroestruturas semicondutoras contendo pontos quânticos de InAs
(Universidade Federal de São Carlos, 2010-05-07)
In this work, we have studied spin polarization of carriers in a resonant tunneling diode GaAs/AlGaAs with InAs quantum dots in the center of the quantum well. We have observed that the photoluminescence of quantum dots ...
Estudo das propriedades estruturais e de transporte eletrônico em nanoestruturas de óxidos semicondutores e metálicos
(Universidade Federal de São Carlos, 2010-05-07)
The structural and transport features of oxide nanostructures synthesized by a vapour phase aproach: the VLS and VS methods were investigated in this work. ITO and In2O3 nanowires were characterized by using XRD, HRTEM and ...