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Efeitos de dimensionalidade em perovskitas de haletos para aplicações em células solares: um estudo ab initio
(Universidade Federal de São Carlos, 2022-10-07)
The structural stability and toxic lead are known obstacles to the current photovoltaic application of perovskite solar cells (PSCs) with high power conversion efficiencies (PCEs). Herein, we perform a systematic study ...
Método de dinâmicas efetivas aplicado na análise da interação qubit-qubit em dispositivos supercondutores: a interação qubit-qubit no contexto da computação quântica
(Universidade Federal de São Carlos, 2022-02-23)
In this dissertation, we approach some aspects of quantum computing. At first, we detail the Deutsch-Jozsa algorithm and show how to implement it in real IBM quantum computers, available free of charge via remote access ...
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 ...
Deposição e caracterização de filmes finos do sistema Zn(1-x)CoxO obtidos por spray pirólise para aplicação em sensor de ozônio
(Universidade Federal de São Carlos, 2021-04-19)
The current concern about reducing the harmful effects of air pollution on environment and human health requires adequate gas sensors that allow an efficient control and monitoring on a wide range of pollutants. This ...
Engenharia de reservatórios com temperaturas efetivas arbitrárias e máquinas térmicas quânticas para sistemas de spins nucleares
(Universidade Federal de São Carlos, 2021-05-24)
In this work we show how to engineer reservoirs with different effective temperatures for a single qubit (quantum bit) system. To that end, we built an appropriate interaction between a qubit, that is, a 13C nuclear spin, ...
Estudo de algoritmos quânticos para resolução de equações diferenciais parciais
(Universidade Federal de São Carlos, 2022-05-02)
With great impact in various areas of engineering and mathematics, quantum computing is an emerging technology with one of its applications in resolving large-scale mathematical problems, such as optimization and simulation. ...
Obtenção, caracterização e avaliação da performance fotocatalítica de nanoestruturas de TiO2 contendo metais de transição (Nb e W)
(Universidade Federal de São Carlos, 2022-04-18)
Heterogeneous photocatalysis has been considered a promising alternative for the removal of several organic pollutants linked to environmental pollution. Among a range of materials currently used, titanium dioxide (TiO2), ...
Propriedades óticas e elétricas de dicalcogenetos de metais de transição sobre talco
(Universidade Federal de São Carlos, 2022-02-24)
Two-dimensional (2D) systems have attracted great attention in the last years, for
fundamental physics and in potential applications as optoelectronic devices. There is a great interest in transition metal dichalcogenides ...
Charge carrier dynamics and optoelectronic properties in quantum tunneling heterostructures
(Universidade Federal de São Carlos, 2021-09-17)
Semiconductor quantum tunneling heterostructures offer a wide range of applications as photosensors, lasers, and circuit elements. However, fundamental questions related to energy transfer mechanisms and the correlation ...
Carrier dynamics of low-dimensional semiconductors: from quantum wells and quantum dots to resonant tunneling devices
(Universidade Federal de São Carlos, 2021-07-22)
This thesis aims to study heterostructures and devices that play a fundamental role in modern nanoelectronic technologies, focusing on group III-V semiconductor materials, especially arsenide-based systems, for photodetection ...