Valleytronics公司
点反射
极化(电化学)
凝聚态物理
铁电性
铁弹性
物理
压电
铁磁性
材料科学
电介质
光电子学
化学
自旋电子学
声学
物理化学
作者
Yuke Zhang,Jun‐Ding Zheng,Wen‐Yi Tong,You-xiang Zhao,Yi‐Fan Tan,Yu-Hao Shen,Zhao Guan,Fang-Ya Yue,Ping Xiang,Ni Zhong,Junhao Chu,Chun‐Gang Duan
出处
期刊:Physical review
日期:2023-12-28
卷期号:108 (24)
被引量:1
标识
DOI:10.1103/physrevb.108.l241120
摘要
Realizing and manipulating valley polarization is extremely important to valleytronics. Ferrovalley materials with spontaneous valley polarization are excellent candidates for this purpose. However, for intrinsic ferrovalley materials, ferromagnetism or ferroelectric polarization is usually required, limiting the development of valleytronics, as only systems without inversion symmetry are considered. In this paper, using both group theory analysis and band structure calculations, we demonstrate that valley polarization can exist in systems with both time and space inversion symmetry, and the ferroelastic effect can control the ferrovalley states. Choosing stacking bilayer systems as an example, we achieved valley polarization switching using the shear strain, which uncovers the link between ferrovalley and ferroelasticity. Our investigations not only provide a mechanical way to manipulate valley degree of freedom but also enrich the understanding of the coupling between different ferroic properties.
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