Signatures of band-like tunnelling in granular nanowires

Abstract

We explore the problem of tunneling through disorderd nanowires, comprised of a random distribution of metallic grains, by means of a many-body model that captures the essential physics of the system. The random configuration of grains gives rise to a smooth band-like set of states, which mediates current flow through the nanowire. Analytical and numerical calculations show the characteristic signature of this unusual band-like transport to be a quadratic variation of the current as a function of the applied voltage (i.e. $I\sim V^2$), a variation that is clearly observed in experimental studies of Pt/C composite nanowires.

arXiv comment4 pages, 3 figures. submitted to the Physcal Review B

References in corpus (7)

• Time-dependent transport in interacting and non-interacting mesoscopic systems
• Spectroscopy of discrete energy levels in ultrasmall metallic grains
• Coulomb effects in granular materials at not very low temperatures
• Transport properties of granular metals at low temperatures
• Many-Body Approch to Spin-Dependent Transport in Quantum Dot Systems
• Non-equilibrium theory for strongly coupled quantum dot with arbitrary on-site correlation strength
• Electron Transport in Granular Metals