Dissipationless layertronics in axion insulator MnBi_(2)Te_(4)  

作　　者：Shuai Li Ming Gong Shuguang Cheng Hua Jiang X.C.Xie 

机构地区：[1]School of Physical Science and Technology,Soochow University,Suzhou 215006,China [2]Institute for Advanced Study,Soochow University,Suzhou 215006,China [3]International Center for Quantum Materials,School of Physics,Peking University,Beijing 100871,China [4]Department of Physics,Northwest University,Xi’an 710069,China [5]Interdisciplinary Center for Theoretical Physics and Information Sciences,Fudan University,Shanghai 200433,China [6]Hefei National Laboratory,Hefei 230088,China

出　　处：《National Science Review》2024年第6期182-189,共8页国家科学评论（英文版）

基　　金：supported by the National Key R&D Program of China(2019YFA0308403 and 2022YFA1403700);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB28000000);the National Natural Science Foundation ofChina(11822407and 11874298).

摘　　要：Surface electrons in axion insulators are endowed with a topological layer degree of freedom followed byexotic transport phenomena, e.g., the layer Hall effect. Here, we propose that such a layer degree of freedomcan be manipulated in a dissipationless way based on the antiferromagnetic MnBi_(2)Te_(4) with tailored domainstructure. This makes MnBi_(2)Te_(4) a versatile platform to exploit the ‘layertronics’ to encode, process and storeinformation. Importantly, the layer filter, layer valve and layer reverser devices can be achieved using thelayer-locked chiral domain wall modes. The dissipationless nature of the domain wall modes makes theperformance of the layertronic devices superior to those in spintronics and valleytronics. Specifically, thelayer reverser, a layer version of the Datta–Das transistor, also fills up the blank in designing the valleyreverser in valleytronics. Our work sheds light on constructing new generation electronic devices with highperformance and low-energy consumption in the framework of layertronics.

关 键 词：axion insulator MnBi_(2)Te_(4) layertronics antiferromagnetic domain wall dissipationless transport 

分 类 号：O469[理学—凝聚态物理]