Regensburg 2010 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 37: MLT: Poster Session
TT 37.29: Poster
Donnerstag, 25. März 2010, 14:00–18:00, Poster A
Scanning tunneling spectroscopy of graphene islands on Ir(111) — •Dinesh Subramaniam1, Viktor Geringer1, Mike Pezzotta1, Marcus Liebmann1, Marco Pratzer1, Carsten Busse2, Thomas Michely2, and Markus Morgenstern1 — 1II. Physikalisches Institut B, Otto-Blumenthal-Straße, RWTH Aachen and JARA-FIT, 52074 Aachen — 2II. Physikalisches Institut, Universität zu Köln, Zülpicher Straße 77, 50937 Köln
Epitaxial graphene islands are produced by ethylene deposition at room Temperature and subsequent annealing to 1320 K [1]. dI/dU curves on Ir(111) and graphene islands look quite similar, while dI/dU images provide confined states within the islands in addition to standing waves around the islands. Edge states are observed at around +50 mV sample voltage and are additionally probed by magnetoresistance curves using a spin-polarized tip.
[1] J. Coraux, A.T. N Diaye, M. Engler, C. Busse, D. Wall, N. Buckanie, F.M. Heringdorf, R. van Gastel, B. Poelsema and T. Michely, New Journal of Physics 11, 023006 (2009)