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 Hermann #
Issue Date: Jun-2011
Publisher: Wiley-VCH Verlag GMBH
Series Title: Physica Status Solidi A, Applications and Materials Research vol:208 issue:6 pages: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
ISSN: 1862-6300
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
Soft Matter and Biophysics
× corresponding author
# (joint) last author

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