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Structural dimerization and charge-orbital ordering in a ferromagnetic semiconductor LiV2S4 monolayer

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ROYAL SOC CHEMISTRY
DOI: 10.1039/d3cp04560a

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With the rise of two-dimensional materials, unique properties that are completely distinct from bulk counterparts continue to emerge, providing a new perspective for the study of transition metal systems.
With the rise of two-dimensional (2D) materials, unique properties that are completely distinct from bulk counterparts continue to emerge at low-dimensional scales, presenting numerous opportunities and challenges. It also provides a new perspective for the study of transition metal systems. Here, based on density functional theory (DFT), the physical properties of 2D monolayer LiV2S4 have been studied. Remarkable changes have been observed, i.e., vanadium dimerization, ferromagnetism, charge distribution and metal-insulator transition (MIT). It is argued that the electronic instability leads to the V dimerization, which further lifts the degeneracy of charge distribution and stabilizes the charge and spin ordering state.

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