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A work carried out by a four professors (Thomas Szkopek, Guillaume Gervais, Richard Martel and Mohamed Siaj) inter-disciplinary (chemistry, physics, electrical engineering) inter-university (McGill, UdeM, UQAM), and also inter-regrouping (RQMP \/ CQMF) team, have just been published in the journal Physical Review Letters.<\/p>\n
This research focuses on the results of their study on the quantum Hall effect in hydrogenated graphene.<\/p>\n
Quantum Hall Effect in Hydrogenated Graphene : The quantum Hall effect is observed in a two-dimensional electron gas formed in millimeter-scale hydrogenated graphene, with a mobility less than 10\u2009\u2009cm2\/V\u00b7s and corresponding Ioffe-Regel disorder parameter (kF\u03bb)-1\u226b1. In a zero magnetic field and low temperatures, the hydrogenated graphene is insulating with a two-point resistance of the order of 250h\/e2. The application of a strong magnetic field generates a negative colossal magnetoresistance, with the two-point resistance saturating within 0.5% of h\/2e2 at 45 T. Our observations are consistent with the opening of an impurity-induced gap in the density of states of graphene. The interplay between electron localization by defect scattering and magnetic confinement in two-dimensional atomic crystals is discussed.<\/p>\n
Source : http:\/\/prl.aps.org\/abstract\/PRL\/v110\/i17\/e176801.
\nPDF: http:\/\/prl.aps.org\/pdf\/PRL\/v110\/i17\/e176801.[:fr]<\/p>\n
Les travaux effectu\u00e9s par une \u00e9quipe de quatre professeurs (Thomas Szkopek, Guillaume Gervais, Richard Martel etMohamed Siaj<\/a>), inter-disciplinaire (chimie, physique, g\u00e9nie \u00e9lectrique), inter-universitaire (McGill, UdeM, UQAM), et \u00e9galement inter-regroupementaire (RQMP\/CQMF) viennent d’\u00eatre publi\u00e9s dans le journal Physical Review Letters<\/a>.<\/p>\n Ces travaux concernent les r\u00e9sultats de leur \u00e9tude sur l’effet Hall quantique dans graph\u00e8ne hydrog\u00e9n\u00e9.<\/p>\n Quantum Hall Effect in Hydrogenated Graphene :<\/b> The quantum Hall effect is observed in a two-dimensional electron gas formed in millimeter-scale hydrogenated graphene, with a mobility less than 10\u2009\u2009cm2\/V\u00b7s and corresponding Ioffe-Regel disorder parameter (kF\u03bb)-1\u226b1. In a zero magnetic field and low temperatures, the hydrogenated graphene is insulating with a two-point resistance of the order of 250h\/e2. The application of a strong magnetic field generates a negative colossal magnetoresistance, with the two-point resistance saturating within 0.5% of h\/2e2 at 45 T. Our observations are consistent with the opening of an impurity-induced gap in the density of states of graphene. The interplay between electron localization by defect scattering and magnetic confinement in two-dimensional atomic crystals is discussed.<\/p>\n Source :<\/b> http:\/\/prl.aps.org\/abstract\/PRL\/v110\/i17\/e176801<\/a>. [:en] A work carried out by a four professors (Thomas Szkopek, Guillaume Gervais, Richard Martel and Mohamed Siaj) inter-disciplinary (chemistry, physics, electrical engineering) inter-university (McGill, UdeM, UQAM), and also inter-regrouping (RQMP \/ CQMF) team, have just been published in the…
\nPDF:<\/b> http:\/\/prl.aps.org\/pdf\/PRL\/v110\/i17\/e176801<\/a>.[:]<\/p>\n","protected":false},"excerpt":{"rendered":"
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