Search
Now showing items 121-130 of 151
Interação entre a Matéria de Vórtices e arranjos minimamente ordenados de defeitos de aspecto colunar em YBa2Cu3O7-δ
(Universidade Federal de São Carlos, 2005-03-10)
In this work we have studied the interaction of Vortex Matter with columnar
defects in YBa2Cu3O7-δ supercondutcting samples. In these samples prepared by a Solgel
chemical route, the granularety is delicately controled ...
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. ...
Spray pirólise de filmes de óxido de zinco dopado com alumínio e estanho
(Universidade Federal de São Carlos, 2019-07-02)
We present a study on the structural, optical and electrical properties of ZnO doped with Al (ZnO: Al) and with Sn (ZnO: Sn) grown on glass substrates using the Spray Pyrolysis technique. The sample were grown in the ...
Colisões atômicas controladas em eletrodinâmica quântica de cavidades : emaranhamento como medida da classicalidade do campo de radiação
(Universidade Federal de São Carlos, 2009-08-12)
In this dissertation we presente a study on the entanglement between two identical and noninteracting
two-level atoms, generated by their interaction with only a singl cavity filed mode.
We also show how to calculate the ...
Separação espacial de fases no modelo de seis vértices
(Universidade Federal de São Carlos, 2020-01-14)
In this work, we have studied the six-vertex model with domain wall and reflecting end boundary conditions, focusing mainly on the influence of boundary conditions on the thermodynamic limit. In order to find a complete ...
Análise de fenômenos críticos no modelo Rock-Paper-Scissors
(Universidade Federal de São Carlos, 2019-07-03)
This present work was developed with the purpose of analyzing critical phenomena in
the Rock-Paper-Scissors model, consisting of three species and the empty site, initially
distributed randomly in a square lattice, in ...
Propriedades magneto-óticas e de magneto-transporte de um diodo de tunelamento ressonante contendo Si δ - doping no poço quântico
(Universidade Federal de São Carlos, 2011-03-11)
In this work, we have studied the transport and optical properties of GaAs = AlGaAs resonant tunneling diodes with Si delta-doping at the center of the quantum well. We have studied magneto-transport and polarized resolved ...
Montagem de um sistema de micro-PL em baixas temperaturas para o estudo de semicondutores bidimensionais
(Universidade Federal de São Carlos, 2020-02-28)
Transition metal dicalcogenides (TMDs) are materials that have been attracted great attention in recent years, both from the point of view of fundamental physics and for a new generation of optoelectronic and spintronic ...
Formulações semiclássicas da mecânica quântica: uma análise do oscilador singular por meio do formalismo de Weyl-Wigner e trajetórias quânticas
(Universidade Federal de São Carlos, 2020-02-10)
The usual quantum mechanics formalism does not address relevant points of the semiclassical limit. In this work two theoretical approaches will be considered: Bohmian mechanics and the Weyl-Wigner formulation. The singular ...
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 ...