Multipiezo Effect in Altermagnetic V 2 SeTeO Monolayer

Strain engineering has been used as an efficient method to modulate various properties of quantum materials and electronic devices. One may establish piezo effects based on a disciplined response to the strain in multifunctional nanosystems. Inspired by a recent theoretical proposal on the interesti...

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Published in:Nano letters 2024-01, Vol.24 (1), p.472-478
Main Authors: Zhu, Yu, Chen, Taikang, Li, Yongchang, Qiao, Lei, Ma, Xiaonan, Liu, Chang, Hu, Tao, Gao, Heng, Ren, Wei
Format: Article
Language:English
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Summary:Strain engineering has been used as an efficient method to modulate various properties of quantum materials and electronic devices. One may establish piezo effects based on a disciplined response to the strain in multifunctional nanosystems. Inspired by a recent theoretical proposal on the interesting piezomagnetism and C-paired valley polarization in the V Se O monolayer, we predict a stable altermagnetic Janus monolayer V SeTeO using density functional theory calculations. It exhibits a novel "multipiezo" effect combining piezoelectricity, piezovalley, and piezomagnetism. Most interestingly, the valley polarization and the net magnetization under strain in V SeTeO exceed these in V Se O, along with the additional large piezoelectric coefficient. The "multipiezo" effect makes Janus monolayer V SeTeO as a tantalizing material for potential applications in nanoelectronics, optoelectronics, spintronics, and valleytronics.
ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.3c04330