Monolayer Cr2Ge2Te6 (ML-CGT) has attracted broad interest due to its novel electronic and magnetic properties. However, there are still controversies on the origin of its intrinsic magnetism. Here, we systematically...
The topological phase transition can be induced by electronic correlation effects combined with spin-orbit coupling (SOC). Here, based on first-principles calculations +U approach, the influence of the electronic correlation effects...
It is crucial to manipulate the valley degree of freedom for the valleytronics and spintronics development, which offers fascinating opportunities in both practical applications and fundamental researches. Here, based on...
Two-dimensional (2D) antiferromagnetic (AFM) heterostructures (HTSs) have broad application prospects since they offer a stray-free field, robustness against magnetic perturbations, and faster spin dynamics, but how to effectively control valley polarization with an AFM substrate is still an issue. Here spin−valley physical coupling in monolayers of MoSi 2 N 4 and AFM MnPS 3 is due to spin−orbit coupling and the absence of inversion symmetry, which made broad application prospects of spin and valley in novel 2D materials. Spontaneous valley polarization in MoSi 2 N 4 /MnPS 3 HTS has been confirmed by using the first-principles calculations and low-energy effective Hamiltonian models. We reveal that its Neél temperature calculated by Monte Carlo simulation is about 340 K above room temperature, which is higher than many 2D AFM materials. The magnetic proximity phenomenon caused by interfacial orbital hybridization is gradually strengthened thanks to the reduction of the distance between the two layers, and valley splitting of the MoSi 2 N 4 /MnPS 3 HTS is calculated to be Δ K−K′ = 9.15 meV. Our computational results offer a basis for the valley polarization in an intrinsic AFM HTS and a practical approach to design and utilize valleytronics devices.
Interfaces between materials are ubiquitous in materials science, especially in devices. As device dimensions are continue to shrink, understanding the physical characteristics that appear at interfaces is crucial to exploit...
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