Dynamical Coulomb Blockade as a Local Probe for Quantum Transport

Abstract

Quantum fluctuations are imprinted with valuable information about transport processes. Experimental access to this information is possible, but challenging. We introduce the dynamical Coulomb blockade (DCB) as a local probe for fluctuations in a scanning tunneling microscope (STM) and show that it provides information about the conduction channels. In agreement with theoretical predictions, we find that the DCB disappears in a single-channel junction with increasing transmission following the Fano factor, analogous to what happens with shot noise. Furthermore we demonstrate local differences in the DCB expected from changes in the conduction channel configuration. Our experimental results are complemented by ab initio transport calculations that elucidate the microscopic nature of the conduction channels in our atomic-scale contacts. We conclude that probing the DCB by STM provides a technique complementary to shot noise measurements for locally resolving quantum transport characteristics.

arXiv comment9 pages, 7 figures, including supplementary material

References in corpus (31)

• Shot Noise in Mesoscopic Conductors
• Quantum properties of atomic-sized conductors
• Observation of the e/3 Fractionally Charged Laughlin Quasiparticles
• Microscopic origin of the conducting channels in metallic atomic-size contacts
• Photon assisted tunneling as an origin of the Dynes density of states
• Quantum suppression of shot noise in atom-size metallic contacts
• A 17 GHz Molecular Rectifier
• Conduction mechanisms in biphenyl-dithiol single-molecule junctions
• Cluster-based density-functional approach to quantum transport through molecular and atomic contacts
• Optical Probe of Quantum Shot Noise Reduction at a Single-Atom Contact
• Coulomb Interaction and Quantum Transport through a Coherent Scatterer
• The energy resolution function of a tunnel junction
• Tomonaga-Luttinger physics in electronic quantum circuits
• Direct link between Coulomb blockade and shot noise in a quantum coherent structure
• Experimental determination of conduction channels in atomic scale conductors based on shot noise measurements
• Estimation of π-π Electronic Couplings from Current Measurements
• Strong back-action of a linear circuit on a single electronic quantum channel
• Large array of sub-10 nm single-grain Au nanodots for use in nanotechnology
• Shot noise and magnetism of Pt atomic chains: accumulation of points at the boundary
• Experimental Test of the Dynamical Coulomb Blockade Theory for Short Coherent Conductors
• Critical Josephson current in the dynamical Coulomb blockade regime
• Amplifier for scanning tunneling microscopy at MHz frequencies
• Atomic scale shot-noise using broadband scanning tunnelling microscopy
• The nature of the electrical conduction in ferromagnetic atomic-size contacts: insights from shot noise measurements and theoretical simulations
• Influence of vibrations on electron transport through nanoscale contacts
• Shot-noise evidence of fractional quasiparticle creation in a local fractional quantum Hall state
• Imaging doubled shot noise in a Josephson scanning tunneling microscope
• Noisy defects in a doped Mott insulator
• Charge trapping and super-Poissonian noise centers in a cuprate high-temperature superconductor
• Fast and accurate shot noise measurements on atomic-size junctions in the MHz regime
• Shot noise as a probe of spin-correlated transport through single atoms

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• Microscopic quantum description of surface plasmon polaritons: Revealing intrinsic ultrastrong light-matter coupling