%0 Journal Article
%T Kondo Resonance versus Fano Interference in Double Quantum Dots Coupled to a Two-Lead One-Ring System
%A CHEN Xiong-Wen
%A SHI Zhen-Gang
%A CHEN Bao-Ju
%A SONG Ke-Hui
%A <br>谌雄文
%A 施振刚
%A 谌宝菊
%A 宋克慧
%J 中国物理快报
%D 2007
%I 
%X We analyse the transport properties of a coupled double quantum dot (DQD) device with one of the dots (QD1) coupled to metallic leads and the other (QD2) embedded in an Aharonov--Bhom (A-B) ring by means of the slave-boson mean-field theory. It is found that in this system, the Kondo resonance and the Fano interference exist simultaneously, the enhancing Kondo effect and the increasing hopping of the QD2-Ring destroy the localized electron state in the QD2 for the QD1-leads, and accordingly, the Fano interference between the DQD-leads and the QD1-leads are suppressed. Under some conditions, the Fano interference can be quenched fully and the single Kondo resonance of the QD1-leads comes into being. Moreover, when the magnetic flux of the A-B ring is zero, the influence of the parity of the A-B ring on the transport properties is very weak, but this influence becomes more obvious with non-zero magnetic flux. Thus this model may be a candidate for futuredevice applications.
%K 72
%K 10
%K Fk
%K 72
%K 15
%K Qm
%K 73
%K 23
%K Ra<br>共振
%K 干扰因素
%K 双量子点
%K 量子学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=C584112B4BF6642DD04E70A1A5B0AEA6&yid=A732AF04DDA03BB3&vid=B91E8C6D6FE990DB&iid=708DD6B15D2464E8&sid=F21EC9F5DDD74475&eid=351B4CDE5BA2B595&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=16