Coexistence of piezoelectricity and magnetism in two-dimensional vanadium dichalcogenides

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 (VS 2 , VSe 2 , and Janus-VSSe) have been investigated...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2019, Vol.21 (1), p.132-136
Main Authors: Yang, Jianhui, Wang, Anping, Zhang, Shaozheng, Liu, Jia, Zhong, Zhicheng, Chen, Liang
Format: Article
Language:English
Subjects:
Chalcogenides
Electronics
First principles
Magnetic materials
Magnetic properties
Magnetic semiconductors
Magnetic transitions
Magnetism
Mathematical analysis
Piezoelectricity
Transition metal compounds
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Summary: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 (VS 2 , VSe 2 , 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 VS 2 and VSe 2 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 VS 2 , Janus-VSSe, and VSe 2 makes them promising piezoelectric materials in nanoscale spin devices. 2D vanadium dichalcogenides are magnetic semiconductors with appreciable in-plane and vertical piezoelectricity, and are promising piezoelectric materials in spin devices.
ISSN:1463-9076
1463-9084
DOI:10.1039/c8cp06535g