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The memristive response in solids
(Universidade Federal de São Carlos, 2023-08-07)
In this Master Thesis, we have investigated basic ingredients of the theory of solid state
transport, namely the Drude like conductivity and the activation of nonequilibrium charge
carriers subjected to a relaxation time, ...
Otimização dos campos de proteção nas técnicas de desacoplamento dinâmico contínuo
(Universidade Federal de São Carlos, 2023-09-15)
In this research project, we investigate the method known as \textit{continuous dynamical decoupling}, which is based on the use of continuously applied external fields to maximize the fidelity of quantum logical operations ...
Estudo dos efeitos da orientação do campo magnético sobre a estrutura eletrônica de poços quânticos semicondutores
(Universidade Federal de São Carlos, 2015-03-27)
This work is aimed to theoretically determine, based on the k p method, the energy spectrum
of the minimum of conduction band and the top of valence band, in a quantum well
heterostructure based on gallium arsenide, ...
Simetria de Lie de uma equação KdV com dispersão não-linear
(Universidade Federal de São Carlos, 2015-04-24)
The Rosenau-Hyman, or K(m, n), equations are a generalized version of the Korteweg-de
Vries (KdV) equation where the dipersive term is non-linear. Such partial differential
equations not always have a specific method by ...
Estudo comparativo entre duas teorias de perturbação dependentes do tempo em mecânica quântica
(Universidade Federal de São Carlos, 2016-02-25)
This monograph shows two perturbative methods to determine the time evolution of quantum systems described by time-depependent Hamiltonians. One method is the standard time-dependent perturbation theory usually found in ...
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 ...
Obtenção e caracterização de heteroestruturas epitaxiais magnetoelétricas de [KNbO3]0,9-[BaNi1/2Nb1/2O3-𝛿]0,1 e [La0,7Sr0,3MnO3]
(Universidade Federal de São Carlos, 2016-10-07)
Magnetoelectric materials have been extensively studied in the last decade, particularly due to the applicability for sensors, attenuators, transformers and others. Hence as an objective for this work we propose a study ...
Processamento e propriedades do sistema ferroelétrico livre de chumbo (Bi, Na)TiO3 (Bi, K)TiO3 BaTiO3
(Universidade Federal de São Carlos, 2015-03-09)
In this work, the lead-free ceramic powders of xBi0,5Na0,5TiO3 - (0,7186 - 0,7143x) Bi0,5K0,5TiO3 - (2814 - 2857x) BaTiO with x = 0,8200; 0,8625; 0,8792, 0,9126 and 0,9300 (BNBK1000x) were prepared by the solid state ...
Caracterização óptica e magneto-óptica de filmes de GaPN
(Universidade Federal de São Carlos, 2016-09-13)
This project proposes a systematic study of III-V semiconductors, which are promising for integration with silicon. It consists of the characterization of GaPN film samples with different nitrogen concentrations. We ...
Optimization and application of the quantum adiabatic theorem, and the quantum origin of classical interference
(Universidade Federal de São Carlos, 2022-03-29)
In this master’s thesis, we developed three different topics. In the first topic, we studied the quantum adiabatic brachistochrone method (QAB) for optimizing adiabatic dynamics. In the first part of this study, we reported ...