Shot noise in tunneling transport through molecules and quantum dots

Abstract

We consider electrical transport through single molecules coupled to metal electrodes via tunneling barriers. Approximating the molecule by the Anderson impurity model as the simplest model which includes Coulomb charging effects, we extend the ``orthodox'' theory to expand current and shot noise systematically order by order in the tunnel couplings. In particular, we show that a combined measurement of current and shot noise reveals detailed information of the system even in the weak-coupling limit, such as the ratio of the tunnel-coupling strengths of the molecule to the left and right electrode, and the presence of the Coulomb charging energy. Our analysis holds for single-level quantum dots as well.

8 pages

Cited by in corpus (5)

• Full counting statistics of super-Poissonian shot noise in multi-level quantum dots
• Co-tunneling current and shot noise in quantum dots
• Super-poissonian noise, negative differential conductance, and relaxation effects in transport through molecules, quantum dots and nanotubes
• Shot noise in tunneling through a single quantum dot
• Dissipative tunneling in structures with quantum dots and quantum molecules