Dresden 2011 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 38: Poster Session Transport
TT 38.34: Poster
Mittwoch, 16. März 2011, 14:00–18:00, P3
Transport studies of microsoldered Graphene — •Nils Freitag1, Marcus Liebmann1, Viktor Geringer1, Alexander Georgi1, Bart Szafranek2, Daniel Neumeier2, and Markus Morgenstern1 — 1II. Physikalisches Institut, RWTH Aachen and JARA-FIT, Otto-Blumethal-Straße, 52074 Aachen — 2Advanced Microelectronic Center Aachen (AMICA), Otto-Blumenthal-Straße 25, 52074 Aachen
We present transport measurements on microsoldered Graphene using a 300 mK/ 10 T He3-bath cryostat. These are complementary to our previous scanning tunneling microscopy studies [1]. Amongst the determination of the mobility of the samples, a distinct half-integer Quantum-Hall effect appears at high fields, whereas the low-field regime is dominated by the weak localisation and antilocalisation features which are analysed in detail. Interestingly, the mobility of graphene exhibits a sudden change at the critical field of the superconducting In-contacts.
V. Geringer, D. Subramaniam, A. K. Michel, B. Szafranek, D. Schall, A. Georgi, T. Mashoff, D. Neumaier, M. Liebmann, M. Morgenstern, Appl. Phys. Lett. 96, 082114 (2010).