Two‐Dimensional Layered Topological Semimetals for Advanced Electronics and Optoelectronics

作者：Huihui Yu, Haoran Zeng, Yanzhe Zhang, Yanzhe Zhang, Yihe Liu, Wei Shangguan, Xiankun Zhang, Zheng Zhang, Yue Zhang, Yue Zhang · 发表于：Advanced Functional Materials · 年份：2024 · DOI：10.1002/adfm.202412913 · 被引用次数：22 · 研究领域：Graphene research and applications、Topological Materials and Phenomena、2D Materials and Applications

Abstract Due to the outstanding physical properties and the integrated characteristics, such as the gapless band structure, high state density, high conductivity, dangling‐bond‐free surface, and tunable Fermi level, two‐dimensional layered topological semimetals (2D LTSMs) exhibit a promising application prospect for including electrode contact and terahertz detection. Despite the surging in attention, a comprehensive strategy is still crucial to meet the necessary conditions for the practical application of 2D LTSMs. According to the fermion types and the band structures, 2D LTSMs can be divided into Dirac semimetals, Weyl semimetals, and nodal‐line semimetals. This review comprehensively encapsulates the intrinsic properties, typical synthesis methods, and applications in electronics and optoelectronics about these 2D LTSMs. To establish the fundamental theory, typical crystal structures, and physical properties of different 2D LTSMs are summarized at first. The effective synthesis strategies including exfoliation, molecular beam epitaxy, and vapor deposition are analyzed systematically. Finally, the article emphasizes the exploration of applications, significant challenges, and promising development directions of 2D LTSMs, which will drive 2D LTSMs to become the promisingly leading technology for next‐generation electronic and optoelectronic systems.