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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 |
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| Cite this article: |
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HUANG Li, YOU Jian-Qiang, YAN Xiao-Hong et al 2002 Chin. Phys. Lett. 19 1505-1508 |
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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.
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| Keywords:
73.21.La 73.23.Hk
73.23.-b
85.35.Ds
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Published: 01 October 2002
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