What is it about?
Electronic transport properties, Transition-Voltage Spectroscopy (TVS) and chirality of molecular junctions composed of metallic Carbon NanoTube electrode-oligo-para-phenylene-metallic Carbon NanoTube electrode via density functional theory-nonequlibrium Green´s function (DFT-NEGF) calculations.
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Why is it important?
We have found that the current is strongly correlated to a purely geometrical chiral parameter, both on-resonance and off-resonance. The Fowler-Nordheim plot exhibits minima, Vmin, that corresponds to voltages where a negative differential resistance (NDR) occurs and tail of a resonant transmission peak enters in the bias window corroborating the scenario in which the coherent transport model gives the correct interpretation to transition voltage spectroscopy (TVS).
Perspectives
The fact that the electrodes are organic is at the origin of differences in the behavior of Vmin if compared to nonorganic contacts treated so far. So, we hope that this area be interesting for scientific community and that other organic electrodes can be investigated.
Prof. Dr. Carlos Alberto Brito da Silva Jr.
Universidade Federal do Para
Read the Original
This page is a summary of: Electronic transport in oligo-para-phenylene junctions attached to carbon nanotube electrodes: Transition-voltage spectroscopy and chirality, Physical Review B, June 2011, American Physical Society (APS),
DOI: 10.1103/physrevb.83.245444.
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