Zobrazeno 1 - 10
of 97
pro vyhledávání: '"César R. de Oliveira"'
Publikováno v:
C, Vol 9, Iss 3, p 76 (2023)
It is shown that it is possible to adapt the quantum graph model of graphene to some types of nonequilateral graphynes considered in the literature; we also discuss the corresponding nanotubes. The proposed models are, in fact, effective models and a
Externí odkaz:
https://doaj.org/article/0bf5b9ea5f3a4777ba2fbf6706f4de66
Autor:
César R. de Oliveira, Thiago Werlang
Publikováno v:
Revista Brasileira de Ensino de Física, Vol 29, Iss 2, Pp 189-201
An updated discussion on physical and mathematical aspects of the ergodic hypothesis in classical equilibrium statistical mechanics is presented. Then a practical attitude for the justification of the microcanonical ensemble is indicated. It is also
Externí odkaz:
https://doaj.org/article/cfce0b96544e474ea115178c207949ae
Publikováno v:
Reports on Mathematical Physics. 89:231-252
Autor:
César R. de Oliveira, Alex F. Rossini
Publikováno v:
Communications in Analysis and Geometry. 30:1227-1268
Publikováno v:
Zeitschrift für Naturforschung A. 76:371-384
We propose an extension, of a quantum graph model for a single sheet of graphene, to multilayer AA-stacked graphene and also to a model of the bulk graphite. Spectra and Dirac cones are explicitly characterized for bilayer and trilayer graphene, as w
Publikováno v:
Zeitschrift für Analysis und ihre Anwendungen. 39:421-431
Publikováno v:
Brazilian Journal of Physics. 52
Publikováno v:
Proceedings of the American Mathematical Society. 148:2509-2523
Autor:
César R. de Oliveira, Renan G. Romano
Publikováno v:
Foundations of Physics. 50:137-146
We propose a simple situation in which the magnetic Aharonov-Bohm potential influences the values of the deficiency indices of the initial Schr\"odinger operator, so determining whether the particle interacts with the solenoid or not. Even with the p
Publikováno v:
Mathematical Physics, Analysis and Geometry. 24
We study the density of states and Lifshitz tails for a family of random Dirac operators on the one-dimensional lattice $\mathbb {Z}$ . These operators consist of the sum of a discrete free Dirac operator with a random potential. The potential is a d