From Coulomb blockade to the Kondo regime in a Rashba dot
From Coulomb blockade to the Kondo regime in a Rashba dot
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DOI：
10.1103/physrevb.76.035307
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发表时间：
2006-10
影响因子：
3.7
通讯作者：
Rosa López;David Sánchez;L. Serra
中科院分区：
文献类型：
--
作者：
Rosa López;David Sánchez;L. Serra
研究了具有局域Rashba相互作用的量子线中的电子输运。Rashba场形成准束缚态，其耦合到具有相反自旋方向的连续态。这个Rashba点的存在会导致类似Fano的反共振和导线线性电导的下降。Fano线的形状是由沿着导线的直接传输信道和通过Rashba点的跳跃之间的干扰引起的。由于限制，我们预测在当地的Rashba区域，这导致库仑阻塞效应的导线的传输特性的大充电能量的观察。重要的是，近藤政权可以实现与Rashba相互作用的适当调整，产生一个振荡的线性电导为固定的占领的Rashba点。
We investigate the electronic transport in a quantum wire with localized Rashba interaction. The Rashba field forms quasibound states that couple to the continuum states with an opposite spin direction. The presence of this Rashba dot causes Fano-like antiresonances and dips in the wire’s linear conductance. The Fano line shape arises from the interference between the direct transmission channel along the wire and the hopping through the Rashba dot. Due to the confinement, we predict the observation of large charging energies in the local Rashba region, which lead to Coulomb-blockade effects in the transport properties of the wire. Importantly, the Kondo regime can be achieved with a proper tuning of the Rashba interaction, giving rise to an oscillating linear conductance for a fixed occupation of the Rashba dot.