Autor: Chico, L. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Electron Transmission through Graphene Bilayer Flakes
Autorzy:: Chico, L.
González, J.
Santos, H.
Pacheco, M.
Brey, L.
Powiązania:: https://bibliotekanauki.pl/articles/1419511.pdf
Data publikacji:: 2012-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.22.-f
73.63.-b
Opis:: We investigate the electronic transport properties of a bilayer graphene flake contacted by two monolayer nanoribbons. This finite-size bilayer flake can be built by overlapping two semi-infinite ribbons. We study and analyze the electronic behavior of this structure by means of a tight-binding method and a continuum Dirac model. We have found that the conductance oscillates markedly between zero and the maximum value of the conductance, allowing for the design of electromechanical switches.
Źródło:: Acta Physica Polonica A; 2012, 122, 2; 299-303
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Unzipped and Defective Nanotubes: Rolling up Graphene and Unrolling Tubes
Autorzy:: Chico, L.
Santos, H.
Ayuela, A.
Jaskólski, W.
Pelc, M.
Brey, L.
Powiązania:: https://bibliotekanauki.pl/articles/1535883.pdf
Data publikacji:: 2010-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 81.05.U-
73.20.-r
73.63.Fg
85.75.-d
Opis:: The properties of carbon nanotubes can be dramatically altered by the presence of defects. In this work we address the properties of two different kinds of defective nanotubes: junctions of achiral tubes with topological defects and partially unzipped carbon nanotubes. In particular, we begin by focussing on the interface states in carbon nanotube junctions between achiral tubes. We show that their number and energies can be derived by applying the Born-von Karman boundary condition to an interface between armchair- and zigzag-terminated semi-infinite graphene layers. We show that these interface states, which were thought to be due to the presence of topological defects, are in fact related to the graphene zigzag edge states. Secondly, we study partially unzipped carbon nanotubes, which can be considered as the junction of a carbon nanotube and a graphene nanoribbon, which has edge features giving rise to novel properties. Carbon nanoribbons act as transparent contacts for nanotubes and viceversa, yielding a high conductance. At certain energies, nanoribbons behave as valley filters for carbon nanotubes; this holds considering electron-electron interaction effects. Furthermore, the application of a magnetic field turns the system conducting, with a 100% magnetoresistance. These novel structures may open a way for new carbon-based devices.
Źródło:: Acta Physica Polonica A; 2010, 118, 3; 433-441
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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