二维石墨炔/VI3范德华异质结构的可调谐电子结构和磁性

IF 3.3 3区 物理与天体物理 Q2 PHYSICS, CONDENSED MATTER
Nan Sun, Baozeng Zhou, Xiaocha Wang
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引用次数: 4

摘要

由于二维磁性材料的优异性能,二维范德华磁异质结构在纳米电子学中得到了更多的研究。本文利用第一性原理计算方法,对二维石墨炔/VI3 (γ-GY/VI3)磁异质结构的电子和磁性进行了详细的研究。研究结果表明,在γ-GY/VI3异质结构中,由于层积模式的不同,可能表现出VI3单层的半导体或半金属特性。此外,异质结构的形成显著提高了VI3单层的垂直磁各向异性(PMA)。在压缩应变下,γ-GY/VI3异质结构的VI3单层实现了从半导体特性到金属特性的转变,从而显著提高了VI3单层的导电性。此外,通过缩短γ-GY/VI3异质结构中的层间距离,在VI3单层中出现自旋向上的半金属态。压缩应变和层间距离都能增强γ-GY/VI3异质结构的层间相互作用、电荷转移和PMA。这些可调谐的电子特性表明,γ-GY/VI3异质结构可以成为纳米电子和自旋电子器件设计的潜在替代品。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Tunable electronic structure and magnetic characteristics of two-dimensional graphyne/VI3 van der Waals heterostructures

Tunable electronic structure and magnetic characteristics of two-dimensional graphyne/VI3 van der Waals heterostructures

Due to the excellent properties of two-dimensional (2D) magnetic materials, 2D van der Waals magnetic heterostructures have obtained more research in nanoelectronics. In this work, the electronic and magnetic properties in 2D graphyne/VI3 (γ-GY/VI3) magnetic heterostructures have been elaborately examined on account of first-principles calculations. As shown by the research results, semiconductor or half-metallic characteristic of VI3 monolayer in γ-GY/VI3 heterostructures may be exhibited due to the difference in stacking pattern. Furthermore, the formation of heterostructures significantly enhances the perpendicular magnetic anisotropy (PMA) of VI3 monolayer. At compressive strains, VI3 monolayer of γ-GY/VI3 heterostructure realizes a shift from semiconductor to metal characteristic, and this significantly enhances the electrical conductivity of VI3 monolayer. Moreover, through shortening the interlayer distance in γ-GY/VI3 heterostructures, the spin-up half-metallic state appears in VI3 monolayer. Both compressive strains and interlayer distance can also enhance the interlayer interaction, charge transfer and PMA of γ-GY/VI3 heterostructure. These tunable electronic properties show that γ-GY/VI3 heterostructures can become potential alternatives applicable to nanoelectronic and spintronic device design.

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来源期刊
Superlattices and Microstructures
Superlattices and Microstructures 物理-物理:凝聚态物理
CiteScore
6.10
自引率
3.20%
发文量
35
审稿时长
2.8 months
期刊介绍: Micro and Nanostructures is a journal disseminating the science and technology of micro-structures and nano-structures in materials and their devices, including individual and collective use of semiconductors, metals and insulators for the exploitation of their unique properties. The journal hosts papers dealing with fundamental and applied experimental research as well as theoretical studies. Fields of interest, including emerging ones, cover: • Novel micro and nanostructures • Nanomaterials (nanowires, nanodots, 2D materials ) and devices • Synthetic heterostructures • Plasmonics • Micro and nano-defects in materials (semiconductor, metal and insulators) • Surfaces and interfaces of thin films In addition to Research Papers, the journal aims at publishing Topical Reviews providing insights into rapidly evolving or more mature fields. Written by leading researchers in their respective fields, those articles are commissioned by the Editorial Board. Formerly known as Superlattices and Microstructures, with a 2021 IF of 3.22 and 2021 CiteScore of 5.4
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