论文标题
在耦合的量子点中的Andreev-Coulomb阻力
Andreev-Coulomb Drag in Coupled Quantum Dots
论文作者
论文摘要
库仑阻力效应已被视为由电子孔不对称诱导的微小电流和在正常耦合量子点设备中的相互作用。在目前的工作中，我们表明可以通过通过超导体来代替正常电极之一来提高效果。此外，我们表明，在低温和与超导铅的足够强耦合中，库仑阻力由安德里夫（Andreev）工艺主导，对系统参数的细节具有鲁棒性，并且可以通过单栅极电压来控制。该机制可以通过阻力电流的符号反转来区分单粒子的贡献。
The Coulomb drag effect has been observed as a tiny current induced by both electron-hole asymmetry and interactions in normal coupled quantum dot devices. In the present work we show that the effect can be boosted by replacing one of the normal electrodes by a superconducting one. Moreover, we show that at low temperatures and for sufficiently strong coupling to the superconducting lead, the Coulomb drag is dominated by Andreev processes, is robust against details of the system parameters and can be controlled with a single gate voltage. This mechanism can be distinguished from single-particle contributions by a sign inversion of the drag current.
