Fractional Conductance in Strongly Interacting 1D Systems.
Fractional Conductance in Strongly Interacting 1D Systems.
复制标题
强相互作用一维系统中的分数电导。
作者：
Gal Shavit;Y. Oreg
我们研究了具有少量通道和强电子-电子相互作用的一维清洁系统。我们发现在某些情况下，即使时间反转对称性成立，它们也可能导致双端分数阶量子化电导和分数阶散粒噪声。利用阿贝尔玻色子化，探讨了不同通道的费米动量的可通约性的条件和产生这种显著现象的相互作用的强度。有限的温度和长度效应是由路德-金刚砂参考化的推广，在特定的相互作用强度值，在强相互作用的制度。我们讨论了我们的模型与最近在受限二维电子气体中的实验的联系，当时间反转对称性守恒时，具有可能的分数电导平台，包括零磁场的情况。在我们模型的几个场景中发现了最主要的观察分数之一，其双端电导等于2/5（e^{2}/h）。最后，我们讨论了如何在非常小的能量尺度下电导返回到整数值以及无序的作用。
We study one-dimensional clean systems with few channels and strong electron-electron interactions. We find that in several circumstances, even when time-reversal symmetry holds, they may lead to two-terminal fractional quantized conductance and fractional shot noise. The condition on the commensurability of the Fermi momenta of the different channels and the strength of the interactions resulting in such remarkable phenomena are explored using Abelian bosonization. Finite temperature and length effects are accounted for by a generalization of the Luther-Emery refermionization at specific values of the interaction strength, in the strongly interacting regime. We discuss the connection of our model to recent experiments in a confined two-dimensional electron gas, featuring possible fractional conductance plateaus, including situations with a zero magnetic field, when time-reversal symmetry is conserved. One of the most dominant observed fractions, with two-terminal conductance equal to 2/5(e^{2}/h), is found in several scenarios of our model. Finally, we discuss how at very small energy scales the conductance returns to an integer value and the role of disorder.
影响因子：
8.6
作者：
Kumar, S.;Pepper, M.;Farrer, I.
通讯作者：
Farrer, I.