Single-electron counting spectroscopy: simulation study of porphyrin in a molecular junction.
Electron counting of a single porphyrin molecule between two electrodes shows a crossover from sub- to super-Poissonian statistics as the bias voltage is scanned. This is attributed to the simultaneous activation of states with electron transfer rates spanning several orders of magnitude. Time-series analysis of consecutive single-electron transfer events reveals fast and slow transport channels, which are not resolved by the average current alone.
Welack
Sven
S
Department of Chemistry, University of California, Irvine, CA 92697, USA. swelack@uci.edu
Maddox
Jeremy B
JB
Esposito
Massimiliano
M
Harbola
Upendra
U
Mukamel
Shaul
S