Universal chiral Luttinger liquid behavior in a graphene fractional quantum Hall point contact
石墨烯分數(shù)量子霍爾點接觸中的通用手性盧廷格液體行為
▲ 作者：LIAM A. COHEN, NOAH L. SAMUELSON, TAIGE WANG, TAKASHI TANIGUCHI, KENJI WATANABE, MICHAEL P. ZALETEL, AND ANDREA F. YOUNG
▲ 鏈接：https://www.science.org/doi/full/10.1126/science.adf9728
▲ 摘要：
一維電子系統(tǒng)以一種不尋常的方式運行洛退，這種方式被盧廷格（Luttinger）液體理論所描述纤房。研究一維系統(tǒng)的一種方法是關注二維分數(shù)量子霍爾（FQH）態(tài)的邊界，這是手性邊緣模式的本壘向臀。邊緣模式形成手性盧廷格液體，可以通過將電子隧穿到其中來研究汞窗。
為此患久，研究者在石墨烯中填充1/3的FQH態(tài)和填充1的整數(shù)量子霍爾態(tài)之間創(chuàng)建了一種稱為量子點接觸的收縮另萤。通過量子點接觸的電導表現(xiàn)出手性盧廷格液體的標度規(guī)律。
▲ Abstract：
One-dimensional systems of electrons behave in an unusual way that is described by the so-called Luttinger liquid theory. One way to study a one-dimensional system is to focus on the boundary of a two-dimensional fractional quantum Hall (FQH) state, which is home to chiral edge modes. The edge modes form chiral Luttinger liquids, which can be studied by tunneling electrons into them. To that end, Cohen et al. created a constriction known as a quantum point contact between an FQH state with 1/3 filling and an integer quantum Hall state with a filling of 1 in graphene. The conductance across the quantum point contact exhibited scaling laws characteristic of a chiral Luttinger liquid.
