Abstract
We present shot noise measurements on Au nanowires showing very pronounced vibration-mode features. In accordance to recent theoretical predictions the sign of the inelastic signal, i.e., the signal due to vibration excitations, depends on the transmission probability becoming negative below a certain transmission value. We argue that the negative contribution to noise arises from coherent two-electron processes mediated by electron-phonon scattering and the Pauli exclusion principle. These signals can provide unique information on the local phonon population and lattice temperature of the nanoscale system.
- Received 14 September 2011
DOI:https://doi.org/10.1103/PhysRevLett.108.146602
© 2012 American Physical Society
Synopsis
A Noisy Junction
Published 5 April 2012
White noise in a nanoscale junction tells us how nonelectronic factors affect conduction.
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