Fano-Rashba effect in a quantum wire

Fano-Rashba effect in a quantum wire
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DOI:
10.1103/physrevb.74.153313
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发表时间:
2006-08
期刊:
影响因子:
3.7
通讯作者:
David Sánchez;L. Serra
David Sánchez;L. Serra
中科院分区:
物理与天体物理2区
文献类型:
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作者:
David Sánchez;L. Serra

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我们预测了具有局域自旋轨道Rashba耦合的半导体量子线中法诺线形的出现。我们表明,Rashba相互作用在严格的一维通道作为一个有吸引力的杂质,导致纯粹的束缚态的形成。在准一维系统中,这些束缚态通过Rashba子带间混合耦合到传导态,从而引起线性电导平台的明显下降。我们给出了精确的数值结果,并提出了一个近似模型捕捉的效果的主要成分。
We predict the occurrence of Fano line shapes in a semiconductor quantum wire with local spin-orbit Rashba coupling. We show that the Rashba interaction acts in a strictly one-dimensional channel as an attractive impurity, leading to the formation of purely bound states. In a quasi-one-dimensional system these bound states couple to the conduction ones through Rashba intersubband mixing, giving rise to pronounced dips in the linear conductance plateaus. We give exact numerical results and propose an approximate model capturing the main ingredients of the effect.