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- W4367000192 abstract "Non-volatile manipulation of valley polarization in solids has long been desired for valleytronics applications but remains challenging. Here, we propose a novel strategy for non-volatile manipulating valleys through bilayer stacking, which enables spontaneous valley polarization without breaking time-reversal symmetry. We call this noval physics as bilayer stacking ferrovalley (BSFV). The group theory analysis reveals that the two-dimensional (2D) valley materials with hexagonal and square lattices can host BSFV. By searching the 2D material database, we discovered 14 monolayer 2D materials with direct gaps that are candidates for realizing BSFV. Further first-principles calculations demonstrate that BSFV exists in RhCl3 and InI bilayers. The bilayer stacking breaks their three- and four-fold rotation symmetry, resulting in 39 and 326 meV valley polarization, respectively. More interestingly, the valley polarization in our systems can be switched by interlayer sliding. Our study opens up a new direction for designing ferrovalley materials and thus greatly enriches the platform for the research of valleytronics." @default.
- W4367000192 created "2023-04-27" @default.
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- W4367000192 date "2023-04-24" @default.
- W4367000192 modified "2023-10-18" @default.
- W4367000192 title "Bilayer Stacking Ferrovalley without Breaking Time-Reversal Symmetry" @default.
- W4367000192 doi "https://doi.org/10.48550/arxiv.2304.12002" @default.
- W4367000192 hasPublicationYear "2023" @default.
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