Two-Dimensional Magnetic Semiconductors Based on Transition-Metal Dichalcogenides V $X_2$ ($X$ = S, Se, Te) and Similar Layered Compounds VI$_{{2}}$ and Co(OH)$_{{2}}$

Strain-Tailored Valley Polarization and Magnetic Anisotropy in Two-Dimensional 2H-VS2/Cr2C Heterostructures

“…Monolayer 2H-VS 2 with a honeycomb structure is a ferromagnetic semiconductor where V atoms are sandwiched by S atoms. , The top and side views of 2H-VS 2 and its hexagonal Brillouin zone are shown in Figure a,b and Figure S1a in the Supporting Information. The 2H-VS 2 unit cell has an indirect band gap (Figure S1c in the Supporting Information) where the conduction band minimum (CBM) is located at M and the valence band maximum (VBM) is located at Γ. Monolayer Cr 2 C, known as a member of the MXene family, shows a half-metallic characteristic (Figure S1d in the Supporting Information) where the spin-up channel goes across the Fermi level, and the spin-down channel shows a semiconducting characteristic, which is in well agreement with previous results …”

“…The in-plane lattice parameters of monolayers Cr 2 C and 2H-VS 2 are 3.194 and 3.185 Å, respectively, which well agree with previous results. 33,34,38,39 The lattice mismatch between monolayers Cr 2 C and 2H-VS 2 is 0.28%. The monolayers 2H-VS 2 and Cr 2 C are modeled in a 2 × 2 × 1 supercell.…”

“…2H-VS 2 is a ferromagnetic semiconductor with intrinsic broken TRS. , The ultrathin VS 2 nanosheets with a thickness of less than five monolayers have been fabricated successfully, whose Curie temperature is above 330 K . In 2H-VS 2 , the berry curvatures at K and K ′ have opposite signs, and the anomalous Hall conductivity is asymmetric, indicated by its spontaneous valley polarization. , The 2H-VS 2 monolayer is limited on valleytronics due to the valence band maximum (VBM) located at Γ. , The MPE of the 2D ferromagnetic monolayer on spontaneously valley-polarized TMDs is rarely reported.…”

Solvent-Induced Degradation of Electrochemically Exfoliated Vanadium Selenide Visualized by Electron Microscopy

“…Two-dimensional (2D) transition-metal dichalcogenides (TMDs) VX 2 (X = S, Se) and their heterostructures have been suggested to exhibit rich and unique electronic properties including confinement-induced charge-ordered states, superconductivity, ferromagnetism, and Curie temperatures ( T C ) considerably above room temperature, − making them extremely promising for room-temperature quantum and spintronic applications. Developing these applications requires the structural characterization of 2D materials and investigation of two main aspects of these materials: their properties under dimensional reduction from bulk to 2D, 2D to one-dimensional (1D), and the emergent phenomena induced by stacking these materials in multilayers.…”

Electronic and Magnetic Properties of Bulk and Monolayer CrSi2: A First-Principle Study

“…In the past decades, two-dimensional (2D) materials such as silicene, h-BN, layered transition metal dichalcogenides (TMD), and monolayer transition metal silicides (TMSi 2 ) have been widely studied [3][4][5][6][7][8][9][10][11]. Contrasting with bulk materials, low-dimensional materials with unusual physical properties are important for potential applications in spintronics [12][13][14][15], magnetic storage [16,17], and molecular scale electronic devices [18,19], etc. Two-dimensional (2D) materials present extensive novel properties due to quantum size effects [20][21][22][23].…”