Spin Equation
Mostrando 1-12 de 44 artigos, teses e dissertações.
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1. Where’s the Spin? A DFT Study of Mixed-Valence Cyanide-Bridged Ruthenium Polypyridines
This article discusses the use of density functional theory (DFT) calculations in classifying and characterizing bimetallic ruthenium mixed-valence systems in terms of their electronic localization/delocalization degree. A standard B3LYP/LanL2DZ methodology including integral equation formalism-polarizable continuum model (IEF-PCM) solvent model is evaluated
J. Braz. Chem. Soc.. Publicado em: 2020-11
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2. Mackie B. Corra para ser feliz: como a corrida salvou minha vida. Rio de Janeiro: Harper Collins; 2019.
This article discusses the use of density functional theory (DFT) calculations in classifying and characterizing bimetallic ruthenium mixed-valence systems in terms of their electronic localization/delocalization degree. A standard B3LYP/LanL2DZ methodology including integral equation formalism-polarizable continuum model (IEF-PCM) solvent model is evaluated
Ciênc. saúde coletiva. Publicado em: 2020-11
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3. Optimization of an Activity Assay of Coprinus Cinereus Peroxidase
ABSTRACT To seek a simple, rapid and sensitive Coprinus cinereus Peroxidase (CIP) activity assay, a convenient one-factor-at-a-time (OFAT) method and a response surface methodology (RSM) were used. The recombinant CIP expressed in Pichia pastoris was purified with the Ni-NTA spin column. Based on the results of catalytic efficiency (kcat/Km) analysis, 2,2'-a
Braz. arch. biol. technol.. Publicado em: 14/11/2018
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4. Comportamento crítico da produção de entropia em modelos com dinâmicas estocásticas competitivas / Critical behavior of entropy production in models with competitive stochastic dynamics
We study kinetic phase transitions and the critical behavior of the entropy production in spin models with nearest neighbor interactions subject to two Glauber dynamics, which simulate two thermal baths at different temperatures. In this way, it is assumed that the system corresponds to a continuous time Markov process which obeys the master equation. Thus,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/04/2011
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5. Sistemas de partículas interagentes dependentes de tipo e aplicações ao estudo de redes de sinalização biológica / Type-dependent interacting particle systems and their applications in the study of signaling biological networks
We study type-dependent stochastic spin models proposed by Fernández et al., which were used to model biological signaling networks. The original modeling setup describes the macroscopic evolution of a finite-size spin-flip model with k types of spins with arbitrary number of internal states interacting through a non-reversible stochastic dynamics. In the t
Publicado em: 2011
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6. A equação de Yang-Baxter para modelos de vértices com três estados
Nesta dissertação estudamos as possíveis soluções da equação de Yang-Baxter para modelos de dezenove vértices invariantes por simetria de paridade e reversão temporal do ponto de vista da geometria algébrica. Determinamos a forma das curvas algébricas que vinculam os respectivos pesos de Boltzmann e descobrimos que suas estruturas são universais.
Publicado em: 2011
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7. The Matrix Product Ansatz for integrable U(1)N models in Lunin-Maldacena backgrounds
We obtain through a Matrix Product Ansatz (MPA) the exact solution of the most general N-state spin chain with U(1)N symmetry and nearest neighbour interaction. In the case N = 6 this model contain as a special case the integrable SO(6) spin chain related to the one loop mixing matrix for anomalous dimensions in N = 4 SYM, dual to type IIB string theory in t
Brazilian Journal of Physics. Publicado em: 2008-06
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8. Transient spin dynamics in semiconductors
We investigate the spin-resolved dynamics of spin-polarized carriers injected via a ferromagnetic scanning-tunnelling-microscope tip (STM tip) into uniformly and non-uniformly n-doped bulk semiconductor - externally driven by a current source. We propagate the injected spin packets (assumed gaussian in space at t = 0) by considering a spin hydrodynamic appro
Brazilian Journal of Physics. Publicado em: 2006-09
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9. Numerical simulation of N-vector spin models in a magnetic field
Three-dimensional N-vector spin models may define universality classes for such diverse phenomena as i) the superfluid transition in liquid helium (currently investigated in the micro-gravity environment of the Space Shuttle) and ii) the transition from hadronic matter to a quark-gluon plasma, studied in heavy-ion collisions at the laboratories of Brookhaven
Brazilian Journal of Physics. Publicado em: 2006-09
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10. Ab Initio study of half-metallic feature and electronic structure of A2FeMoO6 (A=Ba,Ca) magnetic system
We report several ab initio calculations performed over the A2FeMoO6 (A=Ba, Ca) double perovskite. Results show that it is an insulator for the spin up orientation and conductor for the other one. We investigate the electronic structure of A2FeMoO6 by means calculations of density of states for both spin orientations, based on the Density Functional Theory a
Brazilian Journal of Physics. Publicado em: 2006-09
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11. Transport properties of a Ga1-xMn xAs/Ga1-yAl yAs double-barrier
We study the transport properties of a spin filter consisting of a double-barrier resonant tunneling device in which the well is made of a semimagnetic material. Even if the device could be made of several materials, we discuss here the case of a Ga1-xMn xAs/Ga1-yAl yAs system because it can be integrated into the well known AlAs/GaAs technology. We solve th
Brazilian Journal of Physics. Publicado em: 2006-09
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12. A selfconsistent calculation of the transport properties of a double barrier spin filter
A double barrier resonant tunneling device in which the well is made of a semi-magnetic material can work as an efficient spin filter. Today it is possible to make semiconductors that are ferromagnetic at room temperature. Therefore the device studied here has a great potential to be used as a polarizer, an analyzer and other spintronic applications. We disc
Brazilian Journal of Physics. Publicado em: 2006-06