Sub-Poissonian Shot Noise in Molecular Wires

Abstract

We investigate the transport behavior of polyene molecules sandwiched between two metallic contacts using the non-equilibrium Green's function formalism. We calculate both current and noise power as a function of applied voltage and show that they decrease with increasing size of the polyene molecules. We find that even with symmetric connection to metallic contacts, current verus voltage curves can be asymmetric for asymmetrically substituted polyenes. Most importantly, we demonstrate a cross-over from Poissonian to sub-Poissonian behavior in the shot noise as a function of applied voltage. The algorithm for noise power calculation can be used for designing molecules with low noise.

3 pages, 2 figures, submitted to Applied Physics Letters

References in corpus (4)

• Driving current through single organic molecules
• Electrical transport through single-molecule junctions: from molecular orbitals to conduction channels
• Theory of electrical rectification in a molecular monolayer
• On the electrostatic potential profile in biased molecular wires

Cited by in corpus (4)

• Inelastic tunneling effects on noise properties of molecular junctions
• Quantum transport in a resonant tunnel junction coupled to a nanomechanical oscillator
• Time-dependent quantum transport in a resonant tunnel junction coupled to a nanomechanical oscillator
• Decoherence in elastic and polaronic transport via discrete quantum states