Zobrazeno 1 - 10
of 134
pro vyhledávání: '"Anderson, L. R."'
L\'evy flight for electrons in graphene in the presence of regions with enhanced spin-orbit coupling
We propose an electronic L\'evy glass built from graphene nanoribbons in the presence of regions with enhanced spin-orbit coupling. Although electrons in graphene nanoribbons present a low spin-orbit coupling strength, it can be increased by a proxim
Externí odkaz:
http://arxiv.org/abs/2405.10066
We investigate a generalized multi-orbital tight-binding model on a triangular lattice, a system prevalent in a wide range of two-dimensional materials, and particularly relevant for simulating transition metal dichalcogenide monolayers. We show that
Externí odkaz:
http://arxiv.org/abs/2311.11715
Publikováno v:
Phys. Rev. B 108, 245105 (2023)
We investigate the orbital Hall effect through a mesoscopic device with momentum-space orbital texture that is connected to four semi-infinite terminals embedded in the Landauer-B\"uttiker configuration for quantum transport. We present analytical an
Externí odkaz:
http://arxiv.org/abs/2305.01640
Autor:
Adauto J. F. de Souza, Antonio. R. de C. Romaguera, João V. A. Vasconcelos, Luis G. Negreiros-Neto, Viviane M. de Oliveira, Pabyton G. Cadena, Anderson L. R. Barbosa, Marcelo L. Lyra
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-9 (2024)
Abstract Zebrafish have become an important model animal for studying the emergence of collective behavior in nature. Here, we show how to properly analyze the polarization statistics to distinguish shoal regimes. In analogy with the statistical prop
Externí odkaz:
https://doaj.org/article/148676e9458146eea1b6b85921669add
Publikováno v:
Phys. Rev. B 107, 155432 (2023)
In this work we propose an electronic L\'evy flight device, analogous to a recent optical realization. To that end, we investigate the transmission of electrons in graphene nanoribbons in the presence of circular electrostatic clusters, whose diamete
Externí odkaz:
http://arxiv.org/abs/2302.02197
Autor:
da Silva, Juliana M., Santana, Fernando A. F., Ramos, Jorge G. G. S., Barbosa, Anderson L. R.
Publikováno v:
Journal of Applied Physics 132, 183901 (2022)
We investigate the spin Hall effect in a single-layer graphene device with disorder and interface-induced spin-orbit coupling. Our graphene device is connected to four semi-infinite leads that are embedded in a {Landauer-B\"uttiker} setup for quantum
Externí odkaz:
http://arxiv.org/abs/2210.09393
Publikováno v:
Phys. Rev. E 106, 054127 (2022)
We investigate the propagation of waves in one-dimensional systems with L\'evy-type disorder. We perform a complete analysis of non-relativistic and relativistic wave transmission submitted to potential barriers whose width, separation or both follow
Externí odkaz:
http://arxiv.org/abs/2210.09388
Publikováno v:
Journal of Physics 55, 375202 (2022)
We consider the problem of electronic quantum transport through ballistic mesoscopic systems with chaotic dynamics, connected to a three-terminal architecture in which one of the terminals has a tunnel barrier. Using a semiclassical approximation bas
Externí odkaz:
http://arxiv.org/abs/2204.02788
Autor:
Barbosa, Anderson L. R., de Lima, Tiago H. V., Gonzalez, Ivan R. R., Pessoa, Nathan L., Macedo, Antonio M. S., Vasconcelos, Giovani L.
Publikováno v:
Phys. Rev. Lett. 128, 236803 (2022)
We offer a new perspective to the problem of characterizing mesoscopic fluctuations in the inter-plateau region of the integer quantum Hall transition. We found that longitudinal and transverse conductance fluctuations, generated by varying the exter
Externí odkaz:
http://arxiv.org/abs/2203.10082
Publikováno v:
Phys. Rev. B 103, 081111 (2021)
Van der Waals heterostructures based on two-dimensional materials have recently become a very active topic of research in spintronics, both aiming at a fundamental description of spin dephasing processes in nanostructures and as a potential element i
Externí odkaz:
http://arxiv.org/abs/2012.14216