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Propriedades eletrônicas e espectroscópicas de aglomerados de moléculas interestelares
(Universidade Federal de São Carlos, 2013-08-29)
The interstellar médium (ISM) is a gigantic reservoir of atoms and molecules of different shapes and sizes. In general, they are concentrated in enormously big regions in space known as interstellar cloud. There exist huge ...
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 ...
Propriedades de transporte em barreiras magnéticas em grafeno
(Universidade Federal de São Carlos, 2015-04-30)
In this work we studied the properties of Graphene through single and double magnetic barrier. It was used the transfer matrix method for calculating the transmissivity in single and double barriers of monolayer Graphene ...
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 ...
Engenharia de defeitos em semicondutores de gap largo
(Universidade Federal de São Carlos, 2015-12-14)
Defects play a fundamental issue on physical properties of wide bandgap semiconductors
(WBS) due to the possibility of application in high temperature. This work shows the features of the defects in di erent kind of WBS ...
Propriedades físicas de modelos integráveis
(Universidade Federal de São Carlos, 2017-08-16)
In this thesis we tackled two di erent problems of quantum integrability. We derived nite sets of non-linear integral equations to describe physical properties of quantum chains invariant under the super-algebras su(2|1) ...
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 ...
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 ...