Berlin 2005 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 8: Posters Transport
TT 8.6: Poster
Freitag, 4. März 2005, 14:00–18:00, Poster TU C
Periodic Field Emission from an Isolated Nano-Scale Electron Island — •D.V. Scheible1, C. Weiss2, J.P. Kotthaus1, and R.H. Blick3 — 1Center for NanoScience and Fakultät für Physik der Ludwig-Maximilians-Universität, Geschwister-Scholl-Platz 1, 80539 München, Germany — 2Institut für Physik, Carl von Ossietzky Universität, 26111 Oldenburg, Germany — 3Department of Electrical & Computer Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706
We observe field emission from an isolated nano-machined gold island. The island is able to mechanically oscillate between two facing electrodes, which provide recharging and detection of the emission current. We are able to trace and reproduce the transition from current flow through a rectangular tunneling barrier to the regime of field emission. A theoretical model via a master-equation reproduces the experimental data and shows deviation from the Fowler-Nordheim description due to the island’s electric isolation.
[1] D. V. Scheible et al., Phys. Rev. Lett. 93, 186801 (2004).