Zobrazeno 1 - 10
of 176
pro vyhledávání: '"Gilberto Medeiros-Ribeiro"'
Autor:
Douglas A. A. Ohlberg, Diego Tami, Andreij C. Gadelha, Eliel G. S. Neto, Fabiano C. Santana, Daniel Miranda, Wellington Avelino, Kenji Watanabe, Takashi Taniguchi, Leonardo C. Campos, Jhonattan C. Ramirez, Cássio Gonçalves do Rego, Ado Jorio, Gilberto Medeiros-Ribeiro
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-6 (2021)
Here, the authors image twisted bilayer graphene using scanning microwave imaging microscopy, revealing structures with sizes down to 1 nm. They show that is possible by using spontaneously forming nanoscale water menisci that concentrates the microw
Externí odkaz:
https://doaj.org/article/7774f8a91c664429a2e60a6ad688e01f
Quantized conductance coincides with state instability and excess noise in tantalum oxide memristors
Autor:
Wei Yi, Sergey E. Savel'ev, Gilberto Medeiros-Ribeiro, Feng Miao, M.-X. Zhang, J. Joshua Yang, Alexander M. Bratkovsky, R. Stanley Williams
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-6 (2016)
Oxide memristors exhibit noise in excess of 2–4 orders of magnitude above the baseline at quantized conductance states. Here, the authors measure anomalous electrical noise at these states in tantalum oxide memristors and relate it to thermally-act
Externí odkaz:
https://doaj.org/article/49c3da1861944894946db973f3c0de79
Autor:
John Paul Strachan, J. Joshua Yang, L. A. Montoro, C. A. Ospina, A. J. Ramirez, A. L. D. Kilcoyne, Gilberto Medeiros-Ribeiro, R. Stanley Williams
Publikováno v:
Beilstein Journal of Nanotechnology, Vol 4, Iss 1, Pp 467-473 (2013)
Metal–insulator–metal (MIM) structures based on titanium dioxide have demonstrated reversible and non-volatile resistance-switching behavior and have been identified with the concept of the memristor. Microphysical studies suggest that the develo
Externí odkaz:
https://doaj.org/article/6d2ef58343d348899a09f07bc7516c3e
Autor:
Ado Jorio, Jessica S. Lemos, Rafael Nadas, Vinícius Ornelas, Fabiano C. Santana, Luiz Gustavo Cançado, Pedro Venezuela, Takashi Taniguchi, Gilberto Medeiros-Ribeiro, G. S. N. Eliel, Leonardo C. Campos, Andreij C. Gadelha, Cassiano Rabelo, Douglas A. A. Ohlberg, Kenji Watanabe, Daniel Miranda
Publikováno v:
ACS Applied Nano Materials. 4:1858-1866
Twisted bilayer heterostructures (TBHs) are materials whose physical properties depend on the twist angle between the two layers of two-dimensional (2D) materials. Those heterostructures are not fo...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68c5b32db7fc4467026f96e4d3e6fad9
https://doi.org/10.1021/acsanm.0c03230
https://doi.org/10.1021/acsanm.0c03230
Autor:
Tiago C Barbosa, Andreij C Gadelha, Douglas A A Ohlberg, Kenji Watanabe, Takashi Taniguchi, Gilberto Medeiros-Ribeiro, Ado Jorio, Leonardo C Campos
In this work, we study the Raman spectra of twisted bilayer graphene samples as a function of their twist-angles (θ), ranging from 0.03° to 3.40°, where local θ are determined by analysis of their associated moiré superlattices, as imaged by sca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ef3d49ba54e48b26944ca57199ecaf2
http://arxiv.org/abs/2201.01762
http://arxiv.org/abs/2201.01762
Autor:
Diego Tami, Douglas A. A. Ohlberg, Jhonattan C. Ramirez, Cássio Gonçalves do Rego, Gilberto Medeiros-Ribeiro
Publikováno v:
Conference on Lasers and Electro-Optics.
In this work, we analyzed numerically a multiscale nanosystem based on sMIM on TBG. Spontaneous formation of a water-meniscus by the approximation between the tip-sample concentrates the microwave fields, reaching resolutions of up to 1nm.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eed9fdf177e5d64c30c2bdde653d83d6
https://doi.org/10.1364/cleo_at.2022.jw3a.6
https://doi.org/10.1364/cleo_at.2022.jw3a.6
Autor:
Túlio Marcondes Moreira, Jackson Geraldo de Faria, Pedro O.S. Vaz-de-Melo, Gilberto Medeiros-Ribeiro
In this work, an AI-Driven (autonomous) model representation of the La Rance tidal barrage was developed using novel parametrisation and Deep Reinforcement Learning (DRL) techniques. Our model results were validated with experimental measurements, yi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca286dc94e2e188f24c5669a1e2447c1
Publikováno v:
Software Impacts. 14:100356
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41563601ea11b6cbbee2017d4f487266
https://doi.org/10.1016/j.simpa.2022.100356
https://doi.org/10.1016/j.simpa.2022.100356
Autor:
Diego Camilo Tami Lopez, Brian Giraldo, Cassio G. Rego, Jhonattan C. Ramirez, Douglas A. A. Ohlberg, Gilberto Medeiros-Ribeiro, Nobuhiko P. Kobayashi
Publikováno v:
Low-Dimensional Materials and Devices 2021.
Synthesis of novel material often times requires novel analysis and characterization techniques. The possibility of combining sputtering (SPU) and Atomic Layer Deposition (ALD) in the same chamber, Sputtering Atomic Layer Augmented Deposition (SALAD)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b17e21b1abc9e7cc14c2d987202b551
https://doi.org/10.1117/12.2596798
https://doi.org/10.1117/12.2596798
Autor:
Ângelo Luiz Gobbi, Evaldo Ribeiro, Gilberto Medeiros-Ribeiro, Ayrton Bernussi, W. Carvalho, Rafaela Moos, Igor Konieczniak, Graciely Elias dos Santos
Publikováno v:
Journal of Luminescence. 206:639-644
In this work we investigated the electronic states of InAsP/GaAs QDs using photoluminescence (PL) and photomodulated transmission (PT) experiments. PL measurements were performed as a function of temperature and excitation power. As the recombination
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3abef0e9415627dff91e06c9a8a323d2
https://doi.org/10.1016/j.jlumin.2018.10.085
https://doi.org/10.1016/j.jlumin.2018.10.085