title: Detection of vibration-mode scattering in electronic shot noise.
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.
authors.affiliation: Kamerlingh Onnes Laboratorium, Universiteit Leiden, PO Box 9504, 2300 RA Leiden, The Netherlands.
authors.forename: Manohar
authors.initials: M
authors.lastname: Kumar
authors.forename: Rémi
authors.initials: R
authors.lastname: Avriller
authors.forename: Alfredo Levy
authors.initials: AL
authors.lastname: Yeyati
authors.forename: Jan M
authors.initials: JM
authors.lastname: van Ruitenbeek