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Filmes finos supercondutores sob um campo magnético inomogêneo: diminuição da profundidade da frente de fluxo magnético
(Universidade Federal de São Carlos, 2021-03-25)
The phenomenon of superconductivity was discovered by scientist Heike Kamerlingh Onnes in 1911, while studying the resistivity of mercury when cooled below 4,2 K. As predicted by Alexei Abrikosov in 1957, materials from a ...
Development of seminconductor nanowire materials for electronic and photonics applications
(Universidade Federal de São Carlos, 2019-12-05)
The thesis is concerned with study of GaAs nanowires fabricated on Si substrate.
The possibility of growing III-V semiconductor materials directly on silicon in the
form of nanowires is an attractive route to the integration ...
Controle da emissão visível de nanopartículas baseadas em óxido de zinco
(Universidade Federal de São Carlos, 2021-02-25)
We present a study of the synthesis processes and of the structural, vibrational and optical properties of Zn1-xCdxO nanostructured system. The Zn1-xCdxO samples were synthesized using mechanosynthesis method, in the ...
A study of SnO2 nanowire FET devices: ambipolarity effect induced by UV Light exposure and their use as UV sensors
(Universidade Federal de São Carlos, 2021-03-18)
In this work, SnO2 nanowires (NW) were grown by the Vapor-Liquid-Solid (VLS) method and used to build single NW FET devices. As-grown samples went through structural and morphological analysis and seven single NW devices ...
Estudo do modelo de Hubbard bidimensional não homogêneo via teoria do funcional da densidade
(Universidade Federal de São Carlos, 2021-07-14)
We implemented the DFT calculation through the Kohn-Sham formalism adapted by the methodology μ-BALDA for the inhomogeneous two-dimensional Hubbard model, which is also implemented experimentally on an ultra-cold atom traps ...
Algoritmos quânticos para resolução de equações diferenciais: análise de complexidade e aplicabilidade
(Universidade Federal de São Carlos, 2022-02-11)
This work consists in a complexity analysis of an algorithm for solving differential equations,
which shares common characteristics with other algorithms designed for the same task.
Operations such as state preparation, ...
Propriedades ópticas de filmes semicondutores GaAsBi e GaSbBi
(Universidade Federal de São Carlos, 2022-05-02)
Bismuth-diluted III-V are interesting materials for possible applications in optoeletronic and spintronic devices. If we add a small amount of Bi in III-V materials, we observe a strong reduction in the band gap energy. ...
Electromagnetically induced transparency under effects of light-mediated interactions, entanglement generation, and Fock states detection
(Universidade Federal de São Carlos, 2022-10-25)
This thesis presents a brief compilation of the works developed during my doctorate, and can be divided basically into three main parts. In the first one, we show the changes caused by considering long-range interactions ...
Incompressible energy spectrum in atomic Bose-Einstein condensates: a weak wave turbulence theory approach
(Universidade Federal de São Carlos, 2022-08-25)
Bose-Einstein condensates with their superfluidity property provide an interesting parallel to classical fluids. Due to the Kolmogorov spectrum of homogeneous turbulence the statistics of the incompressible velocity field ...
Raman spectroscopy as a reliable tool for strain analysis in iii-nitride superlattices
(Universidade Federal de São Carlos, 2021-09-02)
Since its discovery, the Raman effect has been a great ally in the structural investigation of a wide variety of materials, from macro to nanoscale. However, despite the remarkable sensitivity of techniques based on Raman ...