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arXiv 1006.4844cond-mat.str-el
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重新审视Tunneling到Luttinger液体

Tunneling into a Luttinger liquid revisited

D. N. Aristov, A. P. Dmitriev, I. V. Gornyi, V. Yu. Kachorovskii, D. G. Polyakov, P. Wölfle

摘要:

我们研究了电子-电子相互作用如何重整化隧穿到Luttinger液体超过最低阶的扰动的隧穿振幅。我们发现,传统的不动点只有在点接触模型的吸引力有限的盆地,但有限大小的接触,使它一般不稳定的隧道诱导的液体分裂成两个独立的部分。在重正化到非微扰隧穿不动点的过程中,隧穿电导随温度或偏置电压的变化呈现非单调性。

英文摘要:

We study how electron-electron interactions renormalize tunneling into a Luttinger liquid beyond the lowest order of perturbation in the tunneling amplitude. We find that the conventional fixed point has a finite basin of attraction only in the point contact model, but a finite size of the contact makes it generically unstable to the tunneling-induced break up of the liquid into two independent parts. In the course of renormalization to the nonperturbative-in-tunneling fixed point, the tunneling conductance may show a nonmonotonic behavior with temperature or bias voltage.

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