Zhao Xueyang, Wang Xiaofei, Liu Xiaojie, Yin Haitao, Feng Li, Wang Fenglan, Wan Weilong
J Nanosci Nanotechnol. 2014 Mar;14(3):2658-62. doi: 10.1166/jnn.2014.8484.
Based on the nonequilibrium Green function method, quantum transport through a benzene-shaped quantum dots system is studied. It is shown that the conductance spectrum is sensitive to the arrangement of energy levels of dots. When the energy levels of dots are mismatched, the conductance shows apparent asymmetric structure and striking novel conductance dips appear due to the interference between two distinct paths. The differential conductance as a function of magnetic flux always exhibits 2pi period. An overall suppression of differential conductance emerges for the condition that the levels of dots are all aligned and phi = (2n + 1)pi (n is an integer). In addition, the influence of temperature on the differential conductance is presented.
基于非平衡格林函数方法，研究了通过苯形量子点系统的量子输运。结果表明，电导谱对量子点能级的排列敏感。当量子点的能级不匹配时，电导呈现明显的不对称结构，并且由于两条不同路径之间的干涉会出现显著的新型电导凹陷。作为磁通量函数的微分电导总是呈现2π周期。当量子点的能级全部对齐且φ = (2n + 1)π（n为整数）时，会出现微分电导的整体抑制。此外，还给出了温度对微分电导的影响。
