Coherent Transport Through a Quantum Dot Embedded in a Double-Slit-Like Aharonov-Bohm Ring
HUANG Li1, YOU Jian-Qiang2, YAN Xiao-Hong1, WEI Shi-Hao1
1Department of Physics, Xiangtan University, Xiangtan 411105
2National Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
Coherent Transport Through a Quantum Dot Embedded in a Double-Slit-Like Aharonov-Bohm Ring
1Department of Physics, Xiangtan University, Xiangtan 411105
2National Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
Abstract： Coherent transport through a quantum dot embedded in one arm of a double-slit-like Aharonov-Bohm (AB) ring is studied using the Green's function approach. We obtain experimental observations such as continuous phase shift along a single resonance peak and sharp inter-resonance phase drop. The AB oscillations of the differential conductance of the whole device are calculated by using the nonequilibrium Keldysh formalism. It is shown that the oscillating conductance has a continuous bias-voltage-dependent phase shift and is asymmetric in both linear and nonlinear response regime.
HUANG Li;YOU Jian-Qiang;YAN Xiao-Hong;WEI Shi-Hao. Coherent Transport Through a Quantum Dot Embedded in a Double-Slit-Like Aharonov-Bohm Ring[J]. 中国物理快报, 2002, 19(10): 1505-1508.
HUANG Li, YOU Jian-Qiang, YAN Xiao-Hong, WEI Shi-Hao. Coherent Transport Through a Quantum Dot Embedded in a Double-Slit-Like Aharonov-Bohm Ring. Chin. Phys. Lett., 2002, 19(10): 1505-1508.
2002, Vol. 19 
