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首页> 外文期刊>Physical review >Two-impurity Anderson model revisited: Competition between Kondo effect and reservoir-mediated superexchange in double quantum dots
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Two-impurity Anderson model revisited: Competition between Kondo effect and reservoir-mediated superexchange in double quantum dots

机译:再探讨两杂质安德森模型:近藤效应与双量子点中储层介导的超交换之间的竞争

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摘要

We study a series-coupled double quantum dot in the Kondo regime modeled by the two-impurity Anderson model and find a conduction-band-mediated superexchange interaction that competes with Kondo physics in the strong Coulomb interaction limit. Our numerical renormalization-group results complemented with the higher-order Rayleigh-Schrodinger perturbation theory show that the exchange mechanism leads to clear experimental consequences that can be checked in transport measurements through double quantum dots.
机译:我们研究了由两个杂质安德森模型建模的近藤系统中的耦合双量子点,并发现了在强库仑相互作用极限下能与近藤物理学竞争的导带介导的超交换相互作用。我们的数值重归一化组结果与高阶Rayleigh-Schrodinger扰动理论相辅相成,表明交换机制导致了清晰的实验结果,可以在通过双量子点进行的传输测量中对其进行检查。

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