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Estudos de avalanches de vórtices em filmes supercondutores de Nb e MgB2
(Universidade Federal de São Carlos, 2008-10-28)
If a type-II superconductor is cooled down in a zero applied field and subsequently an external field, larger than the first critical field, is applied, vortices enter through the sample borders until they are captured by ...
Interação plasmon-fônon LO em superredes semicondutoras
(Universidade Federal de São Carlos, 2008-10-07)
This work presents a Raman investigation of the optical vibrations in highly doped In-GaAs/InP and GaAs/AlGaAs superlattices (SL s). The InGaAs/InP SL s grown with different
periods were analyzed using polarized Raman ...
Origem dos momentos magnéticos localizados em ligas de cromo com metais de transição por oscilações de Friedel
(Universidade Federal de São Carlos, 2006-08-02)
The fundamental magnetic properties of chromium and its alloys Cr(1¡x)Nb(x) and Cr(1¡x)V(x), were investigated with the aim to achieve a better comprehension about the nature of the spin density waves. Was dened the edge ...
O estudo do limite de transporte interfilamentar de supercorrentes em amostras supercondutoras de BSCCO.
(Universidade Federal de São Carlos, 2006-03-15)
In this work, we have studied the behavior of the line H*(T) in filamentary samples of BSCCO, which were grown by the LFZ technique, Laser Floating Zone. Previously studied in other specimens prepared by specific routes ...
Estudo de efeitos quânticos nas propriedades eletrônicas de nanofios semicondutores
(Universidade Federal de São Carlos, 2010-03-02)
The growth and characterization of semiconductor nanowires systems have attracted increasing interest due to their potential technological application, like, photo-detectors, optoelectronic devices and their promising ...
Geração e proteção de estados comprimidos do campo e estados atômicos emaranhados em cavidades ópticas
(Universidade Federal de São Carlos, 2010-03-03)
In this work we investigated the engineering of interactions and reservoirs in the context of Cavity Quantum Electrodynamics. The investigated system consists of two identical three-level atoms trapped in two distinct ...
Estudo do modelo de Rabi no contexto de sistemas quânticos abertos
(Universidade Federal de São Carlos, 2009-01-27)
The Rabi Hamiltonian describes the interaction between a two-level atom and a single mode of the quantized electromagnetic field. In this work we study numerically and analytically the dynamics of the Rabi hamiltonian ...
Comportamento termodinâmico de cadeias de dímeros
(Universidade Federal de São Carlos, 2016-10-31)
In this Thesis we propose to describe the thermodynamical properties of dimer chains
in a one-dimensional lattice rstly considering q-states of chain orientation in the lattice
and secondly by a three states model where ...
Effective-action approach to dirty bosons in optical lattices
(Universidade Federal de São Carlos, 2019-02-21)
A system of cold bosonic atoms loaded in an optical lattice potential can undergo a macroscopic phase transition due to quantum fluctuations. As the depth of the lattice potential is increased, the ground state of the ...
Efeitos de interações elétron-elétron e spin-órbita nas propriedades magneto-eletrônicas de magneto-transporte de sistemas confinados.
(Universidade Federal de São Carlos, 2003-10-10)
Effects of the direct and exchange electron-electron interaction, external magnetic
field, symmetry of the charge carriers confining potential, radius, material g-factor, and
also of the spin-orbit interaction in zincblende ...