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19 April 2024

» arxiv » 1510.3506

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Measurement of Topological Berry Phase in Highly Disordered Graphene
K. Bennaceur ; J. Guillemette ; P. L. Lévesque ; N. Cottenye ; F. Mahvash ; N. Hemsworth ; A. Kumar ; Y. Murata ; S. Heun ; M. O. Goerbig ; C. Proust ; M. Siaj ; R. Martel ; G. Gervais ; T. Szkopek ;
Date:	13 Oct 2015
Abstract:	We have observed the quantum Hall effect (QHE) and Shubnikov-de Haas (SdH) oscillations in highly disordered graphene at magnetic fields up to 65 T. Disorder was introduced by hydrogenation of graphene up to a ratio H/C $approx 0.1\%$. The analysis of SdH oscillations and QHE indicates that the topological part of the Berry phase, proportional to the pseudo-spin winding number, is robust against introduction of disorder by hydrogenation in large scale graphene.
Source:	arXiv, 1510.3506
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