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http://hdl.handle.net/1942/12125
Title: | Study on the giant positive magnetoresistance and Hall effect in ultrathin graphite flakes | Authors: | VANSWEEVELT, Rob MORTET, Vincent D'HAEN, Jan RUTTENS, Bart Van Haesendonck, Chris Partoens, Bart Peeters, Francois M. WAGNER, Patrick |
Issue Date: | 2011 | Publisher: | WILEY-BLACKWELL | Source: | PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 208(6). p. 1252-1258 | Abstract: | In this paper, we report on the electronic transport properties of mesoscopic, ultrathin graphite flakes with a thickness corresponding to a stack of 150 graphene layers. The graphite flakes show an unexpectedly strong positive magnetoresistance (PMR) already at room temperature, which scales in good approximation with the square of the magnetic field. Furthermore, we show that the resistivity is unaffected by magnetic fields oriented in plane with the graphene layers. Hall effect measurements indicate that the charge carriers are p-type and their concentration increases with increasing temperature while the mobility is decreasing. The Hall voltage is non-linear in higher magnetic fields. Possible origins of the observed effects are discussed. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim | Notes: | [Vansweevelt, R; Mortet, V; D'Haen, J; Ruttens, B; Wagner, P] Hasselt Univ, Inst Mat Res, B-3590 Diepenbeek, Belgium [D'Haen, J; Ruttens, B; Wagner, P] IMEC Vzw, Div IMOMEC, B-3590 Diepenbeek, Belgium [Van Haesendonck, C] Katholieke Univ Leuven, Lab Solid State Phys & Magnetism, B-3001 Louvain, Belgium [Partoens, B; Peeters, FM] Univ Antwerp, Dept Phys, B-2020 Antwerp, Belgium patrick.wagner@uhasselt.be | Keywords: | graphite; Hall effect; magnetoresistance;graphite; Hall effect; magnetoresistance | Document URI: | http://hdl.handle.net/1942/12125 | ISSN: | 1862-6300 | e-ISSN: | 1862-6319 | DOI: | 10.1002/pssa.201001206 | ISI #: | 000292945800008 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2012 |
Appears in Collections: | Research publications |
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