کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1810241 | 1525236 | 2013 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Bound states in the continuum and Fano antiresonance in electronic transport through a four-quantum-dot system Bound states in the continuum and Fano antiresonance in electronic transport through a four-quantum-dot system](/preview/png/1810241.png)
We study the electronic transport through a four-quantum-dot (FQD) structure with a diamond-like shape through nonequilibrium Green's function theory. It is observed that the bound state in the continuum (BIC) appears in this multiple QDs system, and the position of the BIC in the total density of states (TDOS) spectrum is tightly determined by the strength of the electronic hopping between the upper QD and the lower one. As the symmetry in the energy levels in these two QDs is broken, the BIC is suppressed to a general conductance peak with a finite width, and meanwhile a Fano-type antiresonance with a zero point appears in the conductance spectrum. These results will develop our understanding of the BICs and their spintronic device applications of spin filter and quantum computing.
Journal: Physica B: Condensed Matter - Volume 410, 1 February 2013, Pages 197–200