近日，美国康奈尔大学Kin Fai Mak团队报道了莫尔近藤晶格中Chern金属的涌现。该研究于2026年10月29日发表在《科学》杂志上。

Chern金属是一种携带手性边缘态的二维金属物态。

研究组报道了在阻挫莫尔近藤晶格（角度对齐的MoTe2/WSe2双层）中，于磁性近藤击穿起始处观察到Chern金属。该态是可压缩的，表现为近量子化的霍尔电阻以及由坏金属性体态产生的有限纵向电阻。

研究组通过非局域输运测量和电流诱导的量子反常霍尔击穿，证明了手性边缘态的存在。磁圆二色性测量进一步揭示，在近藤击穿处的变磁转变之前，Chern金属存在一个磁化平台。该结果为通过能带拓扑与近藤相互作用之间的相互影响来对奇异量子相进行莫尔工程开辟了机会。

附：英文原文

Title: Emergence of Chern metal in a moiré Kondo lattice

Author: Wenjin Zhao, Zui Tao, Yichi Zhang, Bowen Shen, Zhongdong Han, Patrick Knüppel, Yihang Zeng, Zhengchao Xia, Kenji Watanabe, Takashi Taniguchi, Jie Shan, Kin Fai Mak

Issue&Volume: 2026-10-29

Abstract: A Chern metal is a two-dimensional metallic state of matter carrying chiral edge states. We report the observation of a Chern metal at the onset of the magnetic Kondo breakdown in a frustrated moiré Kondo lattice--angle-aligned MoTe2/WSe2 bilayers. The state is compressible and is manifested by a nearly quantized Hall resistance and a finite longitudinal resistance arising from a bad metallic bulk. We demonstrate the presence of a chiral edge state by nonlocal transport measurements and current-induced quantum anomalous Hall breakdown. Magnetic circular dichroism measurements further reveal a magnetization plateau for the Chern metal before a metamagnetic transition at the Kondo breakdown. Our results open an opportunity for moiré engineering of exotic quantum phases through the interplay between band topology and Kondo interactions.

DOI: 10.1126/science.adv9181

Source: https://www.science.org/doi/10.1126/science.adv9181