Abstract
The discovery of monolayer MA2Z4 (M = transition metals; A = IVA elements; Z = VA elements) [Hong et al 2020 Science 369 670] family has led another advance for facilitating and harnessing magnetism in low-dimensional materials. However, only Cr and V based MA2N4 compounds exhibit intrinsic magnetism yet with unsatisfied magnetic ordering temperature. Herein, we identify a stable ferromagnetic number of this family, i.e., VGe2Z4 monolayer, by means of first-principles calculations. It is found that the magnetic configuration sustains under both compression and tensile uniaxial in-plane strain, and the former can act as a positive modulator to enhance magnetic ordering temperature (T C). Electronic structure calculations reveal a large band gap in the spin down channel while band-gapless in the spin up channel, an impressive near-half-metallic character, which is a favorable candidate for spintronic device.
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