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Influência da freqüência da corrente alternada da nitretação a plasma nas propriedades superficiais do aço inoxidável ASTM F138
(Universidade Federal de São Carlos, 2013-06-10)
Plasma nitriding is a technique which is used in surface treatments of stainless steel, in order to improve some properties like hardness, wear and corrosion resistance. The nitrided layer consists of some iron nitrides: ...
Medidas quânticas, descoerência e emaranhamento em cenários de física de neutrinos
(Universidade Federal de São Carlos, 2014-02-11)
In the first part of this work we describe the cosmological neutrinos as a composite quantum system and use the generalized theory of quantum measurements to acquire a probabilistic correlation between observable energies ...
Ondas de spin em paredes de domínio unidimensionais em monocamadas magnéticas
(Universidade Federal de São Carlos, 2012-08-16)
Recent investigations on ferromagnetic monolayers predict the existence of spinwave modes without gap in the spectrum, even in the presence of anisotropy. These excitations propagate within the domain walls that exist in ...
Solução numérica das equações de Maxwell para cavidades dielétricas bidimensionais
(Universidade Federal de São Carlos, 2012-08-07)
The objective of this work is to find numerical solutions for Maxwell's equations in two-dimensional dielectric cavities. Such structures can trap light by means of total internal reflections and can be used for constructing ...
Termodinâmica de modelos integráveis
(Universidade Federal de São Carlos, 2014-01-20)
In this work we study the thermodynamics of integrable spin chains, like the Heisenberg model and it's spin-s generalization with competing interactions. We have used the quantum transfer matrix approach and obtained a ...
Processamento e propriedades do sistema ferroelétrico (Li,K,Na)(Nb,Ta)O3 dopado com CuO
(Universidade Federal de São Carlos, 2015-03-09)
The search for new lead-free piezoelectric materials has been a major goal of many scientists in recent years. The main cause is the replacement of widely used lead zirconate titanate (PZT) based ceramics due to the highly ...
Unidades de Ensino Potencialmente Significativas (UEPS)em Ambientes Virtuais de Aprendizagem (AVA) como instrumento de aprendizagem significativa de física no ensino médio
(Universidade Federal de São Carlos, 2013-11-19)
This work uses Potentially Meaningful Teaching Unit (PMTU), the instructional strategy proposed by M. A. Moreira, in a Virtual Learning Environment (VLE) in the Moodle platform, as a tool for learning physics in high school, ...
Efeito da modulação da topologia do confinamento em sistemas quase zero-dimensionais induzida por campo elétrico
(Universidade Federal de São Carlos, 2015-04-01)
Quantum dots grown by epitaxial techniques for optical and transport studies are usually capped by a layer of the same material on which the QDs were grown. Recently, several studies have shown how the growth parameters ...
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 ...
Correlações quânticas e transição quântico-clássica em cavidades ópticas
(Universidade Federal de São Carlos, 2014-02-27)
This thesis consists of three studies in the context of cavity quantum electrodynam- ics. Firstly, we investigate the quantum-to-classical transition of a dissipative cavity .eld by measuring the correlations between two ...