Two-dimensional ferrovalley semiconductors with robust room-temperature ferromagnetism and sizable valley polarization hold great prospects for future miniature information storage devices. As a new member of the ferroic family, however, such materials have rarely been reported. By first-principles calculations, we identify that monolayer $\mathrm{Ce}{\mathrm{I}}_{\text{2}}$ is an intrinsic ferromagnetic semiconductor exhibits excellent ambient stability, strong easy in-plane...

Ferrovalley and topology are two basic concepts in both fundamental research fields emerging device applications. So far, reports extremely scarce regarding the coupling of these scenarios a single material system. By first-principles calculations Monte Carlo simulations, we predict highly stable intrinsic ferrovalley $2H\text{\ensuremath{-}}{\mathrm{RuCl}}_{\text{2}}$ semiconductor with an easy out-of-plane magnetization high Curie temperature 260 K. Due to combination exchange interaction...

Two-dimensional (2D) intrinsic ferrovalley semiconductors provide unprecedented opportunities to investigate valley physics as well providing promising device applications due their exceptional combination of spontaneous spin and polarizations. Here, we have predicted from first-principles calculations Monte Carlo simulations that monolayers (MLs) GdX2 are such extremely rare excellent materials. Apart robust stabilities energetically, dynamically, thermally, mechanically, these 2D materials...

2D intrinsic semiconducting ferromagnets with robust magnetic anisotropy and a high Curie temperature are of great importance for the development high-performance flexible spintronic nanodevices.

Monolayers of Tl-based monochalcogenides are theoretically identified as an ideal platform for the integration spintronics and valleytronics.

Two-dimensional room-temperature Janus ferrovalley semiconductors with large spin, valley and piezoelectric polarizations provide fertile platforms for designing multifunctional nanodevices. Little research has been reported to date on such materials. Here, using first-principles calculations, we predict two dynamically stable titanium chalcohalide (TiSCl TiSeBr) monolayers, which are excellent in-plane magnetization high magnetic transition temperatures (738 884 K). When an extrinsic field...

Two-dimensional ferromagnetic semiconductors with coupled valley physics and piezoelectric responses offer unprecedented opportunities to miniaturize low-power multifunctional integrated devices. Prompted by epitaxial fabrication of nonmagnetic 2H-TiTe2 monolayer on the Au(111) substrate, we predict through both density functional theory Monte Carlo simulations that semilithiated (Li@2H-TiTe2) is a stable near room-temperature semiconducting ferromagnet. Under an out-of-plane magnetization,...

Abstract Recent experimentally observed intrinsic ferromagnetism in two-dimensional (2D) van der Waals crystals has ignited substantial interests due to their great potential spintronic devices. However, practical applications are hampered by rather low Curie temperature and small magnetic anisotropic energy. Here, we predict from first-principles calculations that the 2D pristine hexagonal manganese carbide ( h -MnC) sheet exhibits robust ferromagnetic half-metallic features with complete...

Using an effective low-energy k·p model on the frontier px,y orbitals, we establish a general phase diagram of spin-valley locked band inversion by introducing mechanical strain field into nonmagnetic honeycomb motifs with robust spin–orbit coupling and intrinsically broken symmetry. first-principles calculations, realize such multiple topological transitions in strained InTe monolayer within experimental reach Weyl semimetal as nontrivial boundary state at two critical strains. The massless...