Abstract
We report on a quantum form of electronic flicker noise in nanoscale conductors that contains valuable information on quantum transport. This noise is experimentally identified in atomic and molecular junctions and theoretically analyzed by considering quantum interference due to fluctuating scatterers. Using conductance, shot-noise, and flicker-noise measurements, we show that the revealed quantum flicker noise uniquely depends on the distribution of transmission channels, a key characteristic of quantum conductors. This dependence opens the door for the application of flicker noise as a diagnostic probe for fundamental properties of quantum conductors and many-body quantum effects, a role that up to now has been performed by the experimentally less-accessible shot noise.
- Received 25 July 2021
- Accepted 2 May 2022
DOI:https://doi.org/10.1103/PhysRevLett.128.237701
© 2022 American Physical Society
Physics Subject Headings (PhySH)
synopsis
Pink Noise as a Probe of Quantum Transport
Published 9 June 2022
Measurements of so-called flicker noise can shed light on quantum effects that govern charge transport in nanoscale conductors.
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