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arxiv: 1510.03506 · v1 · pith:IPL4ROKBnew · submitted 2015-10-13 · ❄️ cond-mat.mes-hall

Measurement of Topological Berry Phase in Highly Disordered Graphene

K. Bennaceur , J. Guillemette , P. L. L\'evesque , N. Cottenye , F. Mahvash , N. Hemsworth , A. Kumar , Y. Murata
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S. Heun M. O. Goerbig C. Proust M. Siaj R. Martel G. Gervais T. Szkopek
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classification ❄️ cond-mat.mes-hall
keywords grapheneberrydisorderdisorderedhighlyhydrogenationoscillationsphase
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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.

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