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Estrutura eletrônica de anéis quânticos
(Universidade Federal de São Carlos, 2011-08-09)
The nanoscopic structures with ring topology, or quantum rings, have attracted the interest due to their unique rotational symmetry and the possibility of checking fundamental quantum phenomena. Among them, the study of ...
Síntese e caracterização de compósitos multiferroicos de manganita La: Sr e titanatos de Ba e Sr
(Universidade Federal de São Carlos, 2011-03-18)
In this paper, we seek to prepare composite multiferroics extrinsic whose potential for technological applications, especially in the electronics industry, and the possibility of new phenomena of fundamental scientific ...
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 ...
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 ...
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 ...
Efeito de absorção em espalhamento de elétrons por molécula de formaldeido
(Universidade Federal de São Carlos, 2011-10-02)
This master's project's main objective is to study the effects of absorption in the elastic scattering of electrons by molecules of formaldehyde (CH2O). We calculated differential cross sections (SCD), integral cross ...
Ensino significativo de física por projetos: campanha de economia de energia elétrica
(Universidade Federal de São Carlos, 2011-07-29)
This work presents a strategy of meaningful learning based on projects. In the education proposal, steps are suggested to the development of the general design, regardless of the subject to be studied. These steps envolve ...
Investigação das propriedades magnéticas de amostras de IrO2 e Co:IrO2 sintetizadas via método de Pechini
(Universidade Federal de São Carlos, 2010-08-31)
In this work the magnetic properties of iridium oxide synthesized via Pechini s method and doped with different concentrations of cobalt were studied. The proposal was to investigate the possibility of applying it as a ...
A equação de Yang-Baxter para modelos de vértices com três estados
(Universidade Federal de São Carlos, 2011-03-02)
In this work we study the solutions of the Yang-Baxter equation associated to nineteen vertex models invariant by the parity-time symmetry from the perspective of algebraic geometry. We determine the form of the algebraic ...
Relação entre os métodos de síntese de precursores particulados ferroicos e a obtenção de compósitos magnetoelétricos texturados
(Universidade Federal de São Carlos, 2015-09-04)
This study analyses the relationships between synthesis routes and physical properties of the composite system 67.5(PbMg1/3Nb2/3O3) +32.5(PbTiO3), or simply PMN-PT, as ferroelectric phase and BaFe12O19, or BaM, as magnetic ...