Coexistence of piezoelectricity and magnetism in two-dimensional vanadium dichalcogenides. Issue 1 (10th December 2018)

• Record Type: Journal Article
• Authors: Yang, Jianhui; Wang, Anping; Zhang, Shaozheng; Liu, Jia; Zhong, Zhicheng; Chen, Liang
• Is Part Of: Physical chemistry chemical physics. Volume 21:Issue 1(2018)
• Page Start: 132
• Page End: 136
• Publication Date: 2018-12-10
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c8cp06535g
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : 2D vanadium dichalcogenides are magnetic semiconductors with appreciable in-plane and vertical piezoelectricity, and are promising piezoelectric materials in spin devices. Abstract : Akin to three dimensional (3D) multiferroics, two dimensional (2D) piezoelectric materials with intrinsic magnetic properties are promising applications in nanoscale spintronic devices. In this study, 2D magnetic transition metal dichalcogenides (VS2, VSe2, and Janus-VSSe) have been investigated by the first principles method for their structural, magnetic, electronic, and piezoelectric properties. H type Janus-VSSe has been shown to be more stable than the T type, and dynamically stable through phonon frequency analysis. Our calculations show that H type Janus-VSSe is not only a magnetic semiconductor but also exhibits appreciable in-plane and vertical piezoelectricity. Additionally, H type VS2 and VSe2 also show high in-plane piezoelectricity. The calculated values of in-plane piezoelectricity for these magnetic materials are higher than traditional 3D piezoelectric materials such as α-quartz. The coexistence of magnetism and piezoelectricity in H type VS2, Janus-VSSe, and VSe2 makes them promising piezoelectric materials in nanoscale spin devices.