Redox-dependent Franck–Condon blockade and avalanche transport in a graphene–fullerene single-molecule transistor

Lau, Chit Siong and Sadeghi, Hatef and Rogers, Gregory and Sangtarash, Sara and Dallas, Panagiotis and Porfyrakis, Kyriakos and Warner, Jamie and Lambert, Colin J. and Briggs, G. Andrew D. and Mol, Jan A. (2016) Redox-dependent Franck–Condon blockade and avalanche transport in a graphene–fullerene single-molecule transistor. Nano Letters, 16 (1). pp. 170-176. ISSN 1530-6984

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Abstract

We report transport measurements on a graphene–fullerene single-molecule transistor. The device architecture where a functionalized C60 binds to graphene nanoelectrodes results in strong electron–vibron coupling and weak vibron relaxation. Using a combined approach of transport spectroscopy, Raman spectroscopy, and DFT calculations, we demonstrate center-of-mass oscillations, redox-dependent Franck–Condon blockade, and a transport regime characterized by avalanche tunnelling in a single-molecule transistor.