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arXiv 1809.05484cond-mat.str-el
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有限带宽非均匀Luttinger液体的电导

Conductance of inhomogeneous Luttinger liquids with a finite bandwidth

Joy Prakash Das, Girish S. Setlur

摘要:

本文研究了含杂质的Luttinger液体有限带宽电导随温度的变化。计算是使用关联函数使用强大的非手性玻色子化技术(NCBT)获得。并与Matveev,Yue和Glazman [K. Matveev等人,物理修订版信函71,3351(1993)],他们处理弱相互作用LL。相比之下,NCBT正确地提供了所有相互作用强度值(以及符号)的电导。除了发现与Matveev等人的结果完全一致的弱排斥和弱吸引相互作用,我们还能够探测当排斥很强时所看到的新物理-当非相互作用系统的传输幅度和holon速度之间存在确定的关系时,以弱温度依赖电导的形式。其次,在低温下,弱势垒下,强排斥相互作用的电导率异常高。最后,包括后向散射导致非单调的温度依赖性的电导处理时,与自旋费米子。这项工作也是对NCBT本身的验证。

英文摘要:

The finite-bandwidth conductance of a Luttinger liquid (LL) with a cluster of impurities is studied and its variation with respect to temperature is shown. The calculations are done using the correlation functions obtained using the powerful non-chiral bosonization technique (NCBT) . The results are compared with those obtained by Matveev, Yue and Glazman [K. Matveev et al., Phys. Rev. Lett. 71, 3351 (1993)] who deal with a weakly interacting LL. By contrast, NCBT correctly provides the conductance for all values of the interaction strength (as well as the sign). In addition to finding perfect agreement with the results of Matveev et al. for both weakly repulsive and weakly attractive mutual interactions, we are also able to probe novel physics seen when the repulsion is strong - in the form of a weakly temperature dependent conductance when there is a definite relationship between the transmission amplitude of the non-interacting system and the holon velocity. Secondly, an unusual high conductance for strongly repulsive mutual interactions is observed for a weak barrier at low temperatures. Lastly, inclusion of backward scattering leads to the non-monotonic temperature dependence of conductance when dealing with fermions with spin. This work is also important as a validation of the NCBT itself.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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