Strong enhancement of transport by interaction on contact links
Strong enhancement of transport by interaction on contact links
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DOI：
10.1103/physrevb.75.241103
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发表时间：
2007-06-01
影响因子：
3.7
通讯作者：
Schmitteckert, Peter
中科院分区：
文献类型：
--
作者：
Bohr, Dan;Schmitteckert, Peter
在双探针结构的一维费米系统中，强排斥相互作用通常会导致非共振电导的减小。我们表明，如果排斥相互作用延伸到接触区，即使对于预期电导降低的系统，也可能发生电导的强烈增加。我们计算中的一个重要组成部分是铅的动量空间表示，这使得能量分辨率很高。此外，我们还证明了这些结果与高能截止无关，并且相关的标度是由费米速度决定的。
Strong repulsive interactions within a one-dimensional Fermi system in a two-probe configuration normally lead to a reduced off-resonance conductance. We show that if the repulsive interaction extends to the contact regions, a strong increase of the conductance may occur, even for systems where one would expect to find a reduced conductance. An essential ingredient in our calculations is a momentum-space representation of the leads, which allows a high energy resolution. Furthermore, we demonstrate that these results are independent of the high-energy cutoff and that the relevant scale is set by the Fermi velocity.