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arXiv · 1809.02793

Quantum Coherent Multielectron Processes in an Atomic Scale Contact

Peter-Jan Peters·Fei Xu·Kristen Kaasbjerg·Gianluca Rastelli·Wolfgang Belzig·Richard Berndt
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Abstract

The light emission from a scanning tunneling microscope operated on a Ag(111) surface at 6 K is analyzed from low conductances to values approaching the conductance quantum. Optical spectra recorded at a sample voltages V reveal emission with photon energies hv> 2eV. A model of electrons interacting coherently via a localized plasmon-polariton mode reproduces the experimental data, in particular the kinks in the spectra at eV and 2eV as well as the scaling of the intensity at low and intermediate conductances.

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Peter-Jan Peters, Fei Xu, Kristen Kaasbjerg, Gianluca Rastelli, Wolfgang Belzig, Richard Berndt. 2018-09-08. Quantum Coherent Multielectron Processes in an Atomic Scale Contact. https://doi.org/10.1103/physrevlett.119.066803

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