Flux-dependent transport through an Aharonov-Bohm interferometer with embedded multiple coupled quantum dots |
| |
Authors: | Yu-Xian Li Han-Yong Choi Hyun-Woo Lee |
| |
Institution: | a College of Physics, Hebei Normal University, Shijiazhuang 050016, China b Department of Physics, SungKyunKwan University, Suwon 440-746, Republic of Korea c PCTP and Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea d Asia Pacific Center for Theoretical Physics (APCTP), POSTECH, Pohang 790-784, Republic of Korea |
| |
Abstract: | The electron transport through an Aharonov-Bohm (AB) interferometer with embedded four coupled quantum dots (QDs) is studied with the Green's function technique. The QDs are coupled to each other by the hopping integral tc. Two among them connect with the left lead and the other two with the right lead by the tunneling matrix element T which incorporates the effects of the applied magnetic field φ. The linear conductance spectra swap between the molecular levels and the atomic states by adjusting tc and T. Fano effect appears when the electrons tunnel through different channels contributed by different QDs energy levels, and the Fano resonance peaks split for large tc. The Fano factor can be manipulated by tc, T, φ, and the QD energy levels. |
| |
Keywords: | 73 23 Hk 73 40 Gk 73 63 Kv |
本文献已被 ScienceDirect 等数据库收录! |
|