Van der Waals heterostructures (vdWHs) are attracting a lot of interest for fundamental studies and fabricating novel devices. Currently, most vdWHs exhibit type-I or type-II band alignment, few systems have been shown to be in the type-III class. Herein, we show first-principles evidence that WTe2/HfS2 vdWH possesses long-sought alignment with broken gap, providing promising platform developing tunnel field-effect transistors. Moreover, electronic features can effectively modulated via...

Abstract 2D spontaneous valley polarization attracts great interest both for its fundamental physics and potential applications in advanced information technology, but it can only be obtained from inversion asymmetric single-layer crystals, while the possibility to create symmetric lattices remains unknown. Here, starting lattices, a general design principle realizing based on van der Waals interaction is mapped out. Using first-principles calculations, we further demonstrate feasibility of...

The layer-polarized anomalous Hall effect (LP-AHE), derived from the coupling between Berry curvature and layer degree of freedom, is importance for both fundamental physics device applications. Nonetheless, current research paradigm rooted in topological systems, rendering such a phenomenon rather scarce. Here, through model analysis, we propose an alternative, but general, mechanism realizing LP-AHE valleytronic van der Waals bilayers by interlayer sliding. interaction out-of-plane...

In the field of physics and materials science, discovery layer-polarized anomalous Hall effect (LP-AHE) stands as a crucial development. The current research paradigm is rooted in topological or inversion-asymmetric valleytronic systems, making such phenomenon rather rare. this work, universal design principle for achieving LP-AHE from inversion-symmetric single-layer lattices proposed. Through tight-binding model analysis, we demonstrate that by stacking into antiferromagnetic van der Waals...

Searching for high-performance electrode materials is one of the most effective ways to improve energy density current lithium-ion batteries. Using first-principles calculations, we reveal that pentagonal BN2 (Penta-BN2) can serve as a compelling anode material Penta-BN2 harbors intrinsic metallic nature before and after lithiation, showing excellent electrical conductivity. Significantly, fully lithiated phase Li3BN2, corresponding an ultra-high theoretical capacity 2071 mAh g–1, superior...

Valleytronics that relies on the valley degree of freedom is attracting growing interest because it provides a new platform for information storage. One obstacle in this field to realize polarization an efficient route manipulate physics. Here we propose strategy induce by nonmetal atom doping single-layer Tl2O. Owing intrinsic inversion asymmetry and large spin-orbit coupling, there are two-fold degeneracy excellent spin-valley independence Upon introducing C/N atoms Tl2O, intriguing...

We propose that the PC₆ monolayer is a promising anode material for potassium ion batteries due to its several favorable properties.

Single-layer AgF₂ is investigated as a multiferroic material with ferroelasticity and magnetism. A strain-driven 120° variant switching achieved in monolayer.

The exploration of valley-contrasting physics in two-dimensional materials with strong spin–orbit coupling is great significance for both fundamental and advanced information technology. Here, using first-principles calculations, we report the identification promising single-layer CrSi2N4 CrSi2P4. Single-layer CrSi2P4 are semiconductors a direct band gap locating at K/K′ point, which forms pair degenerate but nonequivalent valleys conduction valence bands. These display intriguing valley...

Two-dimensional multiferroics, combined with ferroelastic and ferroelectric orders, enable unprecedented exploration of applications, such as high-density multistate storage. However, current ferroelastic-ferroelectric-multiferroic research is based on the paradigm unique symmetry in a single-layer lattice, which restricts ferroelectricity to being rarely explored. Here, going beyond existing paradigm, we report design principle for realizing using van der Waals interaction perturbation...

Oxygen vacancies (OVs) on specific sites/facets can strengthen the interaction between reactants and oxide surfaces, facilitating interfacial charge transfer. However, precise monitoring of spatial distribution OVs remains a grand challenge. We report here that single-particle spectroscopy technique addresses this challenge by establishing positive correlation relationship defects bound exciton luminescence across different facets. Taking monoclinic BiVO4 as an example, basis theoretical...

Two-dimensional crystals with coupling of ferroelasticity and attractive electronic properties offer unprecedented opportunities for achieving long-sought controllable devices. However, to date, the reported proposals are mainly based on hypothetical structures. Here, using first-principles calculations, we identify single-layer Nb2ATe4 (A = Si, Ge), which can be exfoliated from its layered bulk, as a promising candidate. Single-layer is found dynamically, thermally, chemically stable. It...

The direction-control of anisotropic electronic behaviors can be achieved <italic>via</italic> ferroelastic switching.

In order to improve the high torque density of coaxial magnetic gear, a novel temperature superconducting (HTS) bulks gear (CMG) with an eccentric pole inner rotor and Halbach arrays outer is proposed in this paper. According Meissner effect, HTS replace traditional epoxy resin flux-modulation effect. Moreover, CMG has structure permanent magnets (PMs) on PMs rotor. The topology 4 23 pairs established. performance assessed verified by finite element analysis.

Abstract Manipulating the valley degree of freedom as an information carrier has been a focused topic for both fundamental and applied research. Here, using first-principles calculations, we report identification monolayer CrX 2 (X = S, Se) novel two-dimensional valleytronic crystal. It shows large spin splitting in valence band, attractive integration valleytronics spintronics. More importantly, through proximity coupling with CrCl 3 , polarization is achieved, which can be further...

Abstract In recent years, 2D valley physics has attracted tremendous attention in both fundamental research and device applications. The search for a coupling with exotic physical properties can enable the exploration of novel quantum devices is therefore significant interest. Here, using model analysis, mechanism proposed that realizes strong between strain antiferromagnetic honeycomb lattice controllable fashion. This idea to modulate exchange interactions through strain, thereby mediating...

Controlling two-dimensional (2D) valleytronics by external means is a major challenge to better information technology. Here, we demonstrate that introducing ferroelectric-aided layer an extraordinary approach for realizing the nonvolatile control of 2D valleytronics. When stacking valleytronic monolayer 2H-VSe2 with ferroelectric Sc2CO2 and polarization pointing along −z direction, system exhibits ferromagnetic semiconducting nature harbors rare intrinsic valley polarization, its...

Differentially expressed microribonucleic acids (miRNAs) in the placenta and circulating exosomes are of diagnostic value for gestational diabetes mellitus (GDM). In a cross-sectional study, we identified miRNAs both pregnant women with GDM, estimated their value.Next-generation sequencing was used to identify that were differentially between GDM normal glucose tolerance pregnancies. Quantitative polymerase chain reaction validate targets. Western blot transmission electron microscopy...

In order to explore the abilities of an integrated three-dimensional micro-nano topography in immunomodulation and promoting bone formation, present study focuses on titanium sheets used by treating them with sandblasted, large-grit acid-etched (SLA)and alkaline thermal reaction. Further, we characterized obtained surface morphology, roughness, hydrophilicity sheets. Moreover, detected their vitro cytocompatibility cell proliferation as well. addition, investigation was carried out for...

The modulation of valley polarization in one single system is important fundamental and practical importance quantum information technology. Here, through the first-principles calculations, we identify single-layer TcIrGe2S6 as a tantalizing candidate for realizing polarization. Arising from combination inversion symmetry breaking intrinsic magnetic exchange interaction, exhibits spontaneous value conduction band 161 meV, favorable achieving intriguing anomalous Hall effect. Furthermore,...

Ideal quantum teleportation transfers an unknown state intact from one party Alice to the other Bob via use of a maximally entangled and communication classical information. If do not share entanglement, maximal average fidelity between be teleported received, according measure-and-prepare scheme, is upper bounded by function $f_{\mathrm{c}}$ that inversely proportional Hilbert space dimension. In fact, even if they so-called may still less than threshold $f_{\mathrm{c}}$. For two-qubit...