Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Jesus, A. P. R."'
A scattering process with gravitons as an intermediate state is investigated. To study such a scattering, the Gravitoelectromagnetism theory is considered. It is a gravitational theory built on the analogy between gravity and electromagnetism. The co
Externí odkaz:
http://arxiv.org/abs/2202.06778
Autor:
Freitas, G. S., Piva, M. M., Grossi, R., Jesus, C. B. R., Souza, J. C., Christovam, D. S., Oliveira Jr., N. F., Leão, J. B., Adriano, C., Lynn, J. W., Pagliuso, P. G.
We have performed X-ray powder diffraction, magnetization, electrical resistivity, heat capacity and inelastic neutron scattering (INS) to investigate the physical properties of the intermetallic series of compounds CeCuBi$_{2-x}$Sb$_{x}$. These comp
Externí odkaz:
http://arxiv.org/abs/2010.03437
Autor:
Jesus, W. D. R., Santos, A. F.
The bumblebee field coupled with gravity is considered. This gravitational theory exhibits spontaneous breaking of Lorentz symmetry. The G\"{o}del-type universe is introduced and then the causality and its violation are studied. Causal and non-causal
Externí odkaz:
http://arxiv.org/abs/2003.13364
Akademický článek
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Autor:
Jesus, W. D. R., Santos, A. F.
The Ricci dark energy is a model inspired by the holographic dark energy models with the dark energy density being proportional to Ricci scalar curvature. Here this model is studied in the bumblebee gravity theory. It is a gravitational theory that e
Externí odkaz:
http://arxiv.org/abs/1903.09316
Autor:
Jesus, W. D. R., Santos, A. F.
In this paper the causality issues are discussed in a non-Riemannian geometry, called Lyra geometry. It is a non-Riemannian geometry originated from Weyl geometry. In order to compare this geometry with the Riemannian geometry, the Einstein field equ
Externí odkaz:
http://arxiv.org/abs/1804.05727
Synchrotron x-ray diffraction experiments were performed on BaFe$_2$As$_2$ and Sr(Fe$_{1-x}$Co$_{x}$)$_2$As$_2$ single crystals as a function of temperature and applied magnetic field along the tetragonal $[1 \bar{1} 0]$ direction, complemented by el
Externí odkaz:
http://arxiv.org/abs/1803.00888
Autor:
Peña, J. P., Piva, M. M., Jesus, C. B. R., Lesseux, G. G., Garitezi, T. M., Tobia, D., Rosa, P. F. S., Grant, T., Fisk, Z., Adriano, C., Urbano, R. R., Pagliuso, P. G., Pureur, P.
Publikováno v:
Physica C: Superconductivity and its applications 531 (2016) 30-38
We report on electrical resistivity, magnetoresistance (MR) and Hall effect measurements in four non-superconducting BaFe$_{2-x}$TM$_x$As$_2$ (TM = Mn, Cu and Ni) single crystals with small values of the chemical substitution $x$. The spin density wa
Externí odkaz:
http://arxiv.org/abs/1703.00999
Motivated by the presence of competing magnetic interactions in the heavy fermion family Ce$TX_2$ ($T$ = transition metal, $X$ = pnictogen), here we study the novel parent compound CeCd$_{1-\delta}$Sb$_{2}$ by combining magnetization, electrical resi
Externí odkaz:
http://arxiv.org/abs/1508.02116
Akademický článek
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