Franck-Condon Blockade in a Single-Molecule Transistor
E. Burzur\'i, Y. Yamamoto, M. Warnock, X. Zhong, K. Park, A. Cornia, and H. S. J. van der Zant
TL;DR
This paper explores how strong electron-vibron coupling causes Franck-Condon blockade in single-molecule transistors with Fe4 magnets, revealing suppressed tunneling current and vibron-assisted excitations.
Contribution
It demonstrates the role of Franck-Condon blockade in single-molecule transistors and supports the findings with density-functional theory calculations.
Findings
Strong suppression of tunneling current at low bias
Vibron-assisted excitations observed
Supported by density-functional theory analysis
Abstract
We investigate vibron-assisted electron transport in single-molecule transistors containing an individual Fe4 Single-Molecule Magnet. We observe a strong suppression of the tunneling current at low bias in combination with vibron-assisted excitations. The observed features are explained by a strong electron-vibron coupling in the framework of the Franck-Condon model supported by density-functional theory.
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