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Teoria do funcional da densidade acoplada ao modelo de Hubbard de uma banda aplicada ao supercondutor La2−xSrxCuO4
(Universidade Federal de Santa Maria, 2020-09-15)
In this work we present the results of a methodology that combines first-principle Density
Functional Theory calculations with the Green’s functions method in order to treat strongly
correlated electronic systems. The ...
Um pipeline de redução de dados espectroscópicos para eventos de quilonova
(Universidade Federal de Santa Maria, 2020-11-09)
This work presents the process of making a pipeline for the reduction of longslit spectroscopic
data, acquired with the GMOS instrument of the Gemini Observatory as part of the optical
follow-up of kilonovae candidates. ...
Pseudogap e energia cinética de supercondutores não convencionais descritos por um modelo de Hubbard em duas dimensões
(Universidade Federal de Santa Maria, 2020-03-30)
In conventional superconductors described by the Bardeen-Cooper-Schrieffer (BCS) Theory,
the transition from the normal to the superconducting state is accompanied by a reduction
in the potential energy and an increase ...
Sistemas magnéticos com interações competitivas: uma abordagem de campo médio com clusters
(Universidade Federal de Santa Maria, 2020-04-27)
We study a model of localized spins which can assume three different states, S = 0 and
1, with two competing interactions: a antiferromagnetic first neighbour interaction (JA)
and a three body interaction between third ...
Complementariedade, emaranhamento, incerteza e invariância de Lorentz
(Universidade Federal de Santa Maria, 2021-05-20)
Bohr’s complementarity principle was introduced as a qualitative statement about quantum
systems, which have properties that are equally real, but mutually exclusive. This
principle, together with the uncertainty principle, ...
Variações em curta e longa escalas de tempo do perfil em duplo-pico de Ha da Galáxia Pictor A
(Universidade Federal de Santa Maria, 2021-10-27)
In the current paradigm nuclear activity in a galaxy happens when the central Supermassive
Black Hole (SMBH) is being fed by an accretion disk of gas. The spectral signature of the
accretion disk is the presence of broad ...
A cinemática e distribuição do gás molecular e ionizado na região central da galáxia Seyfert NGC1125
(Universidade Federal de Santa Maria, 2021-08-18)
We use the J and K spectroscopic observations of the inner 350 pc of the Seyfert 2 galaxy
NGC1125 to investigate the kinematic structure of the hot molecular ( 2000 K) and ionized
gas, as well as of the stars. The ...
Variabilidade interanual dos fluxos de CO2 em uma pastagem natural no bioma Pampa brasileiro
(Universidade Federal de Santa Maria, 2022-03-21)
The Pampa is a biome in South America, located in the southern region of Brazil, Uruguay and part of Argentina, its vegetation is mainly composed of grass interspersed with small gallery forests and riparian forests. The ...
Coexistência de supercondutividade e charge density wave em um regime correlacionado
(Universidade Federal de Santa Maria, 2021-04-28)
The strongly correlated electron systems raise the interest of researchers from different
areas. However, one of the main categories of those are the unconventional superconductors,
also known as high-Tc superconductors. ...
Um modelo para a evolução de redes de proteínas contemplando a transferência horizontal de genes
(Universidade Federal de Santa Maria, 2022-03-31)
Around us we find several examples of complex systems, which are composed of a large
number of elements that interact with each other in very complex ways. These systems
range from the World Wide Web itself to energy ...