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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, ...
Theoretical and experimental investigation on the visible-light controlled functional properties in charged domain wall ferroelectrics
(Universidade Federal de São Carlos, 2023-04-13)
Optical control of ferroelectric properties have been attracted a growing interest as an
alternative to the conventional control by applied electric fields. However, the major
drawback for achieving an effective reversible ...
Funcionalidades elétricas mediadas por defeitos em óxidos semicondutores do tipo-p
(Universidade Federal de São Carlos, 2023-10-27)
Structural defects, such as point defects, play an important role in the electrical transport in semiconductor oxide films. This work presents a systematic study of photoconductivity at room temperature in thin films of ...
Passivação de superfícies de perovskitas via dopagem substitucional
(Universidade Federal de São Carlos, 2023-10-26)
Humanity currently demands new energy sources to replace polluting energy sources and thus restructure the energy matrix in a sustainable manner. In this context, materials science plays a prominent role, as new materials ...
Propriedades magnéticas e magnetoelétricas de compósitos multiferroicos de Pb[Zr0,53Ti0,47]O3/NixCo1-xFe2O4
(Universidade Federal de São Carlos, 2023-10-27)
New technologies are arising from the research and development of magnetism, especially those related to processing, information storage and sensors, are becoming increasingly important. in this regard, magnetoelectric ...
Tunelamento ressonante de férmions massivos de Dirac em sistemas de simples e dupla barreiras em monocamada de grafeno
(Universidade Federal de São Carlos, 2015-04-29)
Nowadays, several efforts have been made by research groups around the physical
properties of the graphene in view of the possible technological applications of their
unique structural and electronic properties. The ...
O papel da interação elétron-elétron no regime Hall quântico interio.
(Universidade Federal de São Carlos, 2004-04-02)
Experimental and theoretical studies of the aspects of particle-like and collective behavior
of electrons in the proximity of the edges of two-dimensional (2DES) and quasi-one-dimensional
(Q1DES) systems, named quantum ...
Cálculos de primeiros princípios para BaO.
(Universidade Federal de São Carlos, 2005-02-28)
In this work we present first principles calculations with Density Functional Theory,
DFT, using norm-conserving pseudopotentials. Initially, we perform calculations
of structural properties for metallic barium, Ba, in the ...
Caracterização elétrica, dielétrica e anelástica de transições de fase em cerâmicas de Pb (Fe1/2Nb1/2)O3
(Universidade Federal de São Carlos, 2007-09-20)
El Niobato de plomo y hierro Pb(Fe1/2Nb1/2)O3 es un material multiferroico: es ferroeléctrico a temperaturas inferiores a 383K y antiferromagnético a temperaturas inferiores a 143K, presentando propiedades magnetoelétricas ...
Multiferróicos monofásicos a base de Pb(Fe2/3W1/3)O3-PbTiO3: acoplamento magnetoelétrico intrínseco
(Universidade Federal de São Carlos, 2010-11-25)
Multiferroic ceramic solid solutions between the ferroelectric relaxor Pb(Fe2/3W1/3)O3 (PFW) and normal ferroelectric PbTiO3 (PT) [PFW-PT] has been synthesized by a modified B-site precursor method and characterized by ...