A5055441668- Physics of Superconductivity and Magnetism
- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Rare-earth and actinide compounds
- Electronic and Structural Properties of Oxides
- High-pressure geophysics and materials
- Education and Digital Technologies
- Superconductivity in MgB2 and Alloys
- Transition Metal Oxide Nanomaterials
- MXene and MAX Phase Materials
- Surface and Thin Film Phenomena
- Science and Education Research
- Superconducting Materials and Applications
- Advanced materials and composites
- Advancements in Battery Materials
- Iron-based superconductors research
- Advanced ceramic materials synthesis
- Boron and Carbon Nanomaterials Research
- Magnetic properties of thin films
- Semiconductor materials and devices
- Environmental Sustainability and Education
- Inorganic Fluorides and Related Compounds
- Non-Destructive Testing Techniques
- Education during COVID-19 pandemic
- Ferroelectric and Piezoelectric Materials
Universidade de São Paulo
2015-2025
Universidade de Brasília
2022-2024
Universidade Federal do Rio Grande do Sul
2012-2023
Universidade Estadual da Região Tocantina do Maranhão
2022
Universidade Federal do ABC
2022
Erasmus MC
2022
Hospital Universitário da Universidade de São Paulo
2020
Universidade Estadual de Campinas (UNICAMP)
1988-2015
Montana State University
2006-2014
Departamento de Ciência e Tecnologia
2003-2014
This work reports an analytical method for determining electrical resistivity (ρ) and sheet resistance (RS) of isotropic conductors. The is compared with previous numerical solutions available experimental data showing a universal behavior An approximated solution also reported allowing one to easily determine ρ RS samples either regular or arbitrary shapes.
A procedure for determining the electrical resistivity of anisotropic materials is presented. It offers several improvements to well-known Montgomery method. One improvement, in particular, ability obtain all three axes an orthorhombic crystal analytically, rather than using iterative approach suggested by third axis. All necessary equations are derived and their application tensor components explained detail. Measurements on isotropic specimens were executed order test foundations samples...
In 2021, global petroleum-based plastic production reached over 400 million metric tons (Mt), and the accumulation of these non-biodegradable plastics in environment is a worldwide concern. Polyhydroxybutyrate (PHB) offers many advantages traditional plastics, being biobased, completely biodegradable, non-toxic. However, its use are still challenging due to low deformation capacity narrow processing window. this work, two linear-chain polyester oligomers were used as plasticizers improve...
Thermal expansion of ${\mathrm{Li}}_{0.9}{\mathrm{Mo}}_{6}{\mathrm{O}}_{17}$ is $a$-axis dominated which reduces the separation conducting chains at low temperature enhancing interchain coupling. This destabilizes Luttinger-liquid fixed point leading to an electronic charge- (or spin-) density wave by Coulomb repulsion, as predicted theories for Luttinger liquids.
Abstract This work outlines the assembly of a cost-effective and straightforward apparatus de-signed to automate contact switching for electrical transport measurements. We report example applications this custom device showcase its versatility by employ-ing it resistivity Hall effect measurements following van der Pauw method on oxygen-deficient strontium titanate single crystals, compressed bismuth using Montgomery method, fresh cleaved Highly Oriented Pyrolytic Graphite multi-line...
Abstract The influence of the electrical contact size and shape on resistivity measurements performed with Montgomery method is evaluated by COMSOL Multiphysics software. Results obtained point or small contacts (≤ 1% sample length) reproduce expected value. simulations are compared previous literature experimental data from copper plates. Contacts up to 10% length excellent choices for using method, as standard deviations less than 1%, no matter shape. When larger required, triangle concave...
SrTiO$_{3}$ undergoes a cubic-to-tetragonal phase transition at 105K. This antiferrodistortive is believed to be in competition with incipient ferroelectricity. Substituting strontium by isovalent calcium induces ferroelectric order. Introducing mobile electrons the system chemical non-isovalent doping, on other hand, leads emergence of dilute metal superconducting ground state. The link between superconductivity and two instabilities an open question, which gathers momentum context growing...
Abstract Pompe disease is an inherited metabolic myopathy caused by deficiency of acid alpha‐glucosidase (GAA), resulting in lysosomal glycogen accumulation. Residual GAA enzyme activity affects onset and severity, although other factors, including dysregulation cytoplasmic metabolism, are suspected to modulate the course. In this study, performed mice patient biopsies, we found elevated protein levels enzymes involved glucose uptake synthesis skeletal muscle from with disease, glycogenin...
In this article, we delineate a loosely selected cohort comprising patients with history of early-onset breast cancer and/or familial occurrence cancer. The aim study was to gain insights into the presence cancer-related gene variants in population from micro-region southern Brazil, specifically Metropolitan Region Curitiba. This area exhibits highly genetically mixed population, mirroring general characteristics Brazilian people.
The relativistic motion of the electron in toroidal model is reported. different motions center mass and charge provide a direct way to describe effect on helical electron. momentum-energy relation deduced easy manner, which led simple interpretation energy. due ratio Compton Bohr radii atom with Z protons compared nucleus radius, providing estimate heaviest element periodic table, found be between = 122 137.
We propose a modified Rudermann, Kittel, Kasuya, Yosida (RKKY) technique to evaluate the magnetic properties of ferromagnetic Kondo-lattice model. Together with previously developed self-energy approach conduction-electron part model, we obtain closed system equations which can be solved self-consistently. The results allow us study conditions for ferromagnetism respect band occupation n, interband exchange coupling J, and temperature T. Ferromagnetism appears relatively low electron (hole)...
Measurements of the magnetic susceptibility $\ensuremath{\chi}$ and electrical resistivity $\ensuremath{\rho}$ are reported in temperature range $300\text{--}900\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ for ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}\mathrm{Mn}{\mathrm{O}}_{3}$, with $x=0$, 0.13, 0.20, 0.25, 0.35, 0.45, $\mathrm{Ca}\mathrm{Mn}{\mathrm{O}}_{3}$. The main focus this work is to develop a better understanding Curie-Weiss paramagnetism temperature-independent contributions...
The Nernst coefficient for the quasi-one-dimensional metal, Li{0.9}Mo{6}O{17}, is found to be among largest known metals (ν≃500 μV/KT at T∼20 K), and enhanced in a broad range of temperature by orders magnitude over value expected from Boltzmann theory carrier diffusion. A comparatively small Seebeck implies that Li{0.9}Mo{6}O{17} bipolar with large, partial coefficients opposite sign. very large thermomagnetic figure merit, ZT∼0.5, high field T≈35-50 K.
ZrB${}_{2}$ is a nonsuperconducting Pauli paramagnetic crystallizing in the AlB${}_{2}$ structure. V substitution for Zr Zr${}_{1\ensuremath{-}x}$V${}_{x}$B${}_{2}$ (0.01 $\ensuremath{\le}$ $x$ 0.1) at few percentage level induces superconductivity with critical temperature reaching maximum of 8.7 K Zr${}_{0.96}$V${}_{0.04}$B${}_{2}$ near solid solubility limit. Specific-heat and lower field dependence results suggest possibility unconventional possibly arising from multiband effects.
We use a combination of many-body model analysis with an ``ab initio'' band-structure calculation to derive the temperature-dependent electronic quasiparticle structure rare-earth metal gadolinium. As local-moment system Gd is properly represented by ferromagnetic (multiband) Kondo-lattice [$s\text{\ensuremath{-}}f(d\text{\ensuremath{-}}f)$ model]. The single-particle part Hamiltonian taken from augmented spherical wave band calculation. proposed method avoids double counting relevant...