Shot Noise Suppression at Room Temperature in Atomic-Scale Au Junctions
- 5 March 2010
- journal article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 10 (4), 1287-1292
- https://doi.org/10.1021/nl904052r
Abstract
Shot noise encodes additional information not directly inferable from simple electronic transport measurements. Previous measurements in atomic-scale metal junctions at cryogenic temperatures have shown suppression of the shot noise at particular conductance values. This suppression demonstrates that transport in these structures proceeds via discrete quantum channels. Using a high-frequency technique, we simultaneously acquire noise data and conductance histograms in Au junctions at room temperature and ambient conditions. We observe noise suppression at up to three conductance quanta, with possible indications of current-induced local heating and 1/f noise in the contact region at high biases. These measurements demonstrate the quantum character of transport at room temperature at the atomic scale. This technique provides an additional tool for studying dissipation and correlations in nanodevices.This publication has 26 references indexed in Scilit:
- Contact Chemistry and Single-Molecule Conductance: A Comparison of Phosphines, Methyl Sulfides, and AminesJournal of the American Chemical Society, 2007
- Effect of Anchoring Groups on Single-Molecule Conductance: Comparative Study of Thiol-, Amine-, and Carboxylic-Acid-Terminated MoleculesJournal of the American Chemical Society, 2006
- Dependence of single-molecule junction conductance on molecular conformationNature, 2006
- Single-Molecule Circuits with Well-Defined Molecular ConductanceNano Letters, 2006
- Resonant tunnelling through a C60molecular junction in a liquid environmentNanotechnology, 2005
- Measurement of Single Molecule Conductance: Benzenedithiol and BenzenedimethanethiolNano Letters, 2004
- Quantum properties of atomic-sized conductorsPhysics Reports, 2003
- Shot noise in mesoscopic conductorsPhysics Reports, 2000
- The signature of chemical valence in the electrical conduction through a single-atom contactNature, 1998
- Temporal Correlation of Electrons: Suppression of Shot Noise in a Ballistic Quantum Point ContactPhysical Review Letters, 1995