Shot noise of the hybrid double-quantum-dot Aharonov-Bohm interferometer coupled to normal and superconductive terminals
1 Key Laboratory of Cluster Science of Ministry of Education, and School of Physics, Beijing Institute of Technology Beijing 100081, China
2 Department of Physics, The University of Hong Kong - Pokfulam Road, Hong Kong, China
Received: 7 February 2012
Accepted: 23 July 2012
The shot noise of double-quantum-dot interferometer connected to normal metal and superconductor is investigated by employing the nonequilibrium Green's function approach. The gate voltages control the Aharonov-Bohm oscillation structure of shot noise, and the oscillation peaks can be converted to valleys by changing the gate voltages. The Andreev-reflection-generated shot noise is suppressed resulting from the interference effect and bias voltages. The asymmetric Fano factor with respect to the gate voltages exhibits the peak-valley resonant structure.
PACS: 85.35.-p – Nanoelectronic devices / 73.23.-b – Electronic transport in mesoscopic systems / 73.21.La – Quantum dots
© EPLA, 2012