Teses e dissertações
Recent Submissions
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Exploração da luminescência de filmes finos de ZnO dopados com érbio e európio
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 25/07/2024)Trivalent rare earth ions (RE³⁺) possess unique electronic configurations and numerous energy levels, resulting in fascinating optical properties across the visible region. These characteristics open various application ... -
Two-dimensional transition metal halides for optical applications: impact of excitons
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 01/08/2024)Two-dimensional materials have experienced rapid growth since the first exfoliation of graphene in 2004, which is an atomically thin sheet of carbon atoms exfoliated from graphite. Despite several unprecedented properties ... -
Vidros de spin e redes neurais: diagramas de fase das máquinas de Boltzmann clássicas e semiclássicas
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 23/08/2024)Classical and quantum Boltzmann machines have become useful models for complex systems in statistical physics, but also learning algorithms on neural networks and optimization problems outside of statistical physics. ... -
Dispositivos de memória em heteroestruturas 2D de MoSe2 sobre clinocloro
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 29/08/2024)The study of materials that present lamellar characteristics and can be isolated in monolayers has become relevant due to their unique properties widely reported in the literature. The transition metal dichalcogenides ... -
Interfacial engineering of van der Waals heterostructures: impacts on the excitonic and valley properties
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 27/08/2024)The study of two-dimensional (2D) materials has attracted significant attention due to their unique physical properties and potential applications in optoelectronics, spintronics, and quantum technologies. Transition metal ... -
Propriedades microestruturais e elétricas de nanoestruturas de WO3 puras e dopadas com Mn
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 21/05/2024)Tungsten trioxide (WO3) is an n-type wide bandgap semiconductor that has been widely studied due to its properties, being used in the generation of electricity “water splitting”, catalysis, gas sensors, among others. ... -
Correlações intrínsecas em sistemas tipo-Dirac confinados por um campo magnético constante
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 04/07/2024)The Weyl-Wigner formalism in phase space is investigated in the context of Dirac spinors as qubits correlated by continuous degrees of freedom. The extension to relativistic equations connects quantum mechanical phenomena ... -
Critical phenomena in rock-paper-scissors model
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 07/05/2024)This work presents a study on the dynamics of the Rock-Paper-Scissors (RPS) model, with particular emphasis on the influence of variations of the control parameters on the emergence and dissipation of spatial patterns as ... -
Dicalcogenetos de metais de transição em poucas camadas: o papel das espécies de calcogênio e suas propriedades não convencionais
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 10/06/2024)Two-dimensional (2D) Transition Metal Dichalcogenides (TMDs) constitute the most studied class of 2D materials after graphene, as they have a variety of applications already demonstrated in the laboratory, including ... -
Platforms for quantum information and technology
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 29/02/2024)This work presents a collection of scientific research results in the field of quantum information. The first paper describes the mathematical properties of a particular type of state of light, called the two-mode squeezed ... -
Propriedades ópticas e magneto-ópticas de heteroestruturas WSe2/ β-Ga2O3
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 22/03/2024)Transition metal dichalcogenides (TMDs) have been the subject of intense study in recent years due to their unique properties. In their three-dimensional configuration (3D), they are known as indirect bandgap semiconductors, ... -
Algoritmo quântico para o problema de gerenciamento de estoque
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 24/11/2023)In this work, we developed a quantum algorithm in Adiabatic Quantum Computing for the Inventory Management Problem, adapted for factories that use gravitational shelves as the standard storage system. The main goal of the ... -
Break of reciprocity on the light scattered by a disordered atomic cloud
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 07/03/2024)This study delves into interference phenomena, specifically exploring interference patterns arising from light scattered by a disordered assembly of cold atoms. The investigation focuses on disrupting optical path reciprocity ... -
Desenvolvimento e estudo de memristores baseados em redes de nanofios de SnO2
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 17/01/2024)In this work, memristors were produced based on tin dioxide nanowire networks (𝑆𝑛𝑂2). These nanowires were synthesized by the VLS (Vapor-Liquid-Solid) method. The nanowire structural analysis via X-ray diffraction (XRD) ... -
Teoria de controle ótimo aplicada a sistemas quânticos abertos
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 10/11/2023)This thesis, grounded in the field of quantum computing, explores diverse and crucial topics for the advancement of this area. Firstly, we introduce an innovative "double-bang" solution using optimal control theory for ... -
Propriedades magnéticas e magnetoelétricas de compósitos multiferroicos de Pb[Zr0,53Ti0,47]O3/NixCo1-xFe2O4
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 27/10/2023)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 ... -
Modelos de branas em (5+1) dimensões e o espectro dos leptóns carregados
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 27/10/2023)This manuscript is concerned with a mechanism for explaining the mass spectrum of the charged leptons within (5 + 1)-dimensional braneworlds. As a preliminary objective, new two co-dimensional thick braneworlds ought to ... -
Magnetic fields as a tool to control superconducting devices
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 16/10/2023)The quantum nature and dissipation-free flow of electric currents in superconducting materials have taken a central role as technological developments push forward the necessity of new methods for processing and dealing ... -
Funcionalidades elétricas mediadas por defeitos em óxidos semicondutores do tipo-p
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 27/10/2023)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 ... -
Otimização dos campos de proteção nas técnicas de desacoplamento dinâmico contínuo
(Universidade Federal de São Carlos, UFSCar, Programa de Pós-Graduação em Física - PPGF, Câmpus São Carlos, 15/09/2023)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 ...