Berlin 2008 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 14: Transport: Nanoelectronics III - Molecular Electronics
TT 14.5: Vortrag
Dienstag, 26. Februar 2008, 10:30–10:45, H 3010
Modeling of tunneling through single endohedral N@C60 molecules — •Carsten Timm1, Jacob E. Grose2, Wolfgang Harneit3, and Daniel C. Ralph2 — 1University of Kansas, Lawrence, USA — 2Cornell University, Ithaca, USA — 3Freie Universität Berlin, Germany
We report on recent experimental and theoretical results for single-molecule transistors involving endohedral N@C60 fullerene molecules. In this talk, we will focus on the theoretical modeling. The observed differential conductance shows strong evidence for the exchange interaction between electrons in the fullerene LUMO and the nitrogen p-electrons, favoring an antiferromagnetic interaction. In addition, soft vibrational modes are seen, which are attributed to oscillations of the molecule as a whole. We discuss a model Hamiltonian that reproduces the main features of the experimental conductance.