Symmetry-Protected Two-Dimensional Half-Semi-Metal NiVS6As2 Monolayer

IF 2.2 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Electronic Materials Pub Date : 2024-08-02 DOI:10.1007/s11664-024-11321-4

Meng-xue Zhu, Wei-xiao Ji, Hui-wen Zhu, Qiang Cao, Bao-min Zhang

引用次数: 0

Abstract

Two-dimensional (2D) half-metallic magnets are expected to achieve breakthroughs in the field of spintronics and quantum computation due to their 100% spin polarization and non-dissipative ballistic transport characteristics. However, the current availability of practical applications for these materials is limited. In this paper, a new 2D material NiVS₆As₂ is predicted based on density functional theory (DFT). It has a ferromagnetic ground state with a high Curie temperature, T_C = 150 K and half-semi-metal (HSM) band structure protected by a structural symmetry degeneracy point on the Fermi surface, which can be controlled by an electric field and strain. When an out-of-plane electric field is applied, NiVS₆As₂ shows a Chern insulator with a quantum anomalous Hall (QAH) effect. These results expand the family of 2D magnetic semimetals, and provide new theoretical inspiration for understanding the protection of degenerate point symmetry.

Abstract Image

查看原文本刊更多论文

受对称性保护的二维半金属 NiVS6As2 单层

二维（2D）半金属磁体具有 100% 的自旋极化和非耗散弹道传输特性，有望在自旋电子学和量子计算领域实现突破。然而，目前这些材料的实际应用非常有限。本文基于密度泛函理论（DFT）预测了一种新型二维材料 NiVS6As2。它具有铁磁性基态，居里温度较高，TC = 150 K，半半金属（HSM）带状结构受费米面上结构对称退化点的保护，可由电场和应变控制。当施加平面外电场时，NiVS6As2 显示出具有量子反常霍尔效应（QAH）的切尔绝缘体。这些结果扩展了二维磁性半金属家族，并为理解退化点对称性的保护提供了新的理论灵感。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Electronic Materials 工程技术-材料科学：综合

CiteScore

4.10

自引率

4.80%

发文量

693

审稿时长

3.8 months

期刊介绍： The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.