近日，新加坡南洋理工大学的Baile Zhang及其研究小组与香港中文大学的Haoran Xue合作并取得一项新进展。经过不懈努力，他们证实非厄米趋肤效应中伪磁抑制现象的存在。相关研究成果已于2024年4月15日在国际知名学术期刊《科学通报》上发表。

在这项工作中，该研究团队利用二维紧束缚晶格，成功证实了伪磁场对非厄米趋肤效应的抑制作用。随着伪磁场的增强，趋肤模式被逐渐推入体内，趋肤拓扑面积减小，朗道能级能量得以恢复。

这一发现为定位控制提供了一种时间反演不变的新方法，并有望应用于各种不受磁场影响的非厄米趋肤效应经典波器件中。

据悉，最近有研究表明，非厄米趋肤效应可以被磁场抑制。

附：英文原文

Title: Pseudomagnetic suppression of non-Hermitian skin effect

Author: anonymous

Issue&Volume: 2024/04/15

Abstract: It has recently been shown that the non-Hermitian skin effect can be suppressed by magnetic fields. In this work, using a two-dimensional tight-binding lattice, we demonstrate that a pseudomagnetic field can also lead to the suppression of the non-Hermitian skin effect. With an increasing pseudomagnetic field, the skin modes are found to be pushed into the bulk, accompanied by the reduction of skin topological area and the restoration of Landau level energies. Our results provide a time-reversal invariant route to localization control and could be useful in various classical wave devices that are able to host the non-Hermitian skin effect but inert to magnetic fields.

DOI: 10.1016/j.scib.2024.04.023

Source: https://www.sciencedirect.com/science/article/abs/pii/S2095927324002573