Franck-Condon Blockade in a Single-Molecule Transistor
  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. 
E. Burzur\'i, Y. Yamamoto, M. Warnock, X. Zhong, K. Park, A. Cornia   and H. S. J. van der Zant
cond-mat.mes-hall