Shot noise spectroscopy on a semiconductor quantum dot in the elastic and inelastic cotunneling regimes

Abstract

We report shot noise spectroscopy on a semiconductor quantum dot in a cotunneling regime. The DC conductance measurements show clear signatures of both elastic and inelastic cotunneling transport inside a Coulomb diamond. We observed Poissonian shot noise with the Fano factor $F\approx 1$ in the elastic cotunneling regime, and super-Poissonian Fano factor $1<F<3$ in the inelastic cotunneling regime. The differences in the value of the Fano factor between elastic and inelastic processes reveal the microscopic mechanisms involved in the cotunneling transport.

7 pages, 5 figures

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• Full counting statistics and shot noise of cotunneling in quantum dots and single-molecule transistors
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• Non-renewal statistics in quantum transport through the eyes of first-passage and waiting time distributions
• Measurements of a Quantum Dot with an Impedance-Matching On-Chip LC Resonator at GHz Frequencies
• Superpoissonian shot noise in organic magnetic tunnel junctions
• Conformation Controllable Inelastic Charge Transport and Shot Noise Behavior in Metal-String Single Molecular Devices
• Noise of a superconducting magnetic flux sensor based on a proximity Josephson junction