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- W4379933430 abstract "The altermagnetism can achieve spin-split bands in collinear symmetry-compensated antiferromagnets. Here, we predict altermagnetic order in Janus monolayer $mathrm{Cr_2SO}$ with eliminated inversion symmetry, which can realize the combination of piezoelectricity and altermagnetism in a two-dimensional material, namely 2D piezoelectric altermagnetism. It is found that $mathrm{Cr_2SO}$ is an altermagnetic semiconductor, and the spin-split bands of both valence and conduction bands are near the Fermi level. The $mathrm{Cr_2SO}$ has large out-of-plane piezoelectricity ($|d_{31}|$$=$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.
- W4379933430 created "2023-06-09" @default.
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- W4379933430 date "2023-06-06" @default.
- W4379933430 modified "2023-09-28" @default.
- W4379933430 title "Piezoelectric altermagnetism and spin-valley polarization in Janus monolayer $mathrm{Cr_2SO}$" @default.
- W4379933430 doi "https://doi.org/10.48550/arxiv.2306.04094" @default.
- W4379933430 hasPublicationYear "2023" @default.
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