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- W4386026953 abstract "Altermagnetism can achieve spin-split bands in collinear symmetry-compensated antiferromagnets. Here, we predict altermagnetic order in Janus monolayer Cr2SO with eliminated inversion symmetry, which can realize the combination of piezoelectricity and altermagnetism in a two-dimensional (2D) material, namely, 2D piezoelectric altermagnetism. It is found that Cr2SO is an altermagnetic semiconductor, and the spin-split bands of both valence and conduction bands are near the Fermi level. The Cr2SO has large out-of-plane piezoelectricity (|d31| = 0.97 pm/V), which is highly desirable for ultrathin piezoelectric device application. Due to spin-valley locking, both spin and valley can be polarized by simply breaking the corresponding crystal symmetry with uniaxial strain. Our findings provide a platform to integrate spin, piezoelectricity, and valley in a single material, which is useful for multi-functional device applications." @default.
- W4386026953 created "2023-08-22" @default.
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- W4386026953 date "2023-08-21" @default.
- W4386026953 modified "2023-10-09" @default.
- W4386026953 title "Piezoelectric altermagnetism and spin-valley polarization in Janus monolayer Cr2SO" @default.
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- W4386026953 doi "https://doi.org/10.1063/5.0161431" @default.
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