Novel mixed topological state in monolayer MnSbO3

IF 2.9 3区化学 Q3 CHEMISTRY, PHYSICAL

Physical Chemistry Chemical Physics Pub Date : 2025-04-24 DOI:10.1039/d5cp00782h

Yanzhao Wu, Li Deng, Junwei Tong, Xiang Yin, Gaowu W. Qin, Xianmin Zhang

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Abstract

An important goal of modern condensed-matter physics involves the search for new states of matter with emergent properties and desirable functionalities. In this study, based on the symmetry analysis and first-principles calculations, the ferromagnetic monolayer MnSbO₃ is proven to be a quantum anomalous Hall effect (QAH) insulator with tunable topological state. As the magnetization direction varies in xy plane, monolayer MnSbO₃ transforms among QAH insulator with Chern number C=1, topological trivial half metal and QAH insulator with Chern number C=-1 with a period of 60˚. As the magnetization direction located in xz plane, the Chern number of monolayer MnSbO₃ changes between C=±3 and C=±1, realizing the regulation of topological phase. Interestingly, a mixed QAH effect and topological trivial half metal topological state occurs at the topological phase transition point between two QAH effects. As a result, a mixed topological state is realized in monolayer MnSbO₃ by regulating the magnetization direction.

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单层MnSbO3的新型混合拓扑态

现代凝聚态物理学的一个重要目标涉及寻找具有涌现性质和理想功能的物质新状态。在这项研究中，基于对称性分析和第一性原理计算，铁磁单层MnSbO3被证明是一种具有可调拓扑状态的量子反常霍尔效应（QAH）绝缘体。随着磁化方向在xy平面上的变化，单层MnSbO3在Chern数C=1的QAH绝缘体、拓扑平凡半金属和Chern数C=-1的QAH绝缘子之间以60˚的周期转变。由于磁化方向位于xz平面，单层MnSbO3的Chern数在C=±3和C=±1之间变化，实现了拓扑相位的调节。有趣的是，在两个QAH效应之间的拓扑相变点处出现了混合QAH效应和拓扑平凡半金属拓扑状态。结果，通过调节磁化方向，在单层MnSbO3中实现了混合拓扑状态。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Chemistry Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

5.50

自引率

9.10%

发文量

2675

审稿时长

2.0 months

期刊介绍： Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.