Abstract In this paper, we study topological numbers for uncharged and charged static black holes obtained in $$z=3$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>z</mml:mi> <mml:mo>=</mml:mo> <mml:mn>3</mml:mn> </mml:mrow> </mml:math> Hořava–Lifshitz gravity theory different ensembles, where z measures the degree of anisotropy between space time. We first calculate by changing value dynamic coupling constant, find that with spherical flat horizons have same...

The thermodynamics and weak cosmic censorship conjecture in Reissner-Nordström anti-de Sitter black holes are investigated by the scattering of scalar field. first law non-extremal hole is recovered scattering. increase horizon radius indicates that singularity not naked this hole. For near-extremal extremal holes, validity tested minimum values function f at their final states. It found both can be overcharged. When ω=qϕ, state still an ω≠qϕ, it becomes a with new mass charge.

Current research into the supply chain coordination problem of product quality focuses mainly on two-echelon chain, and most models neglect demand relationship between quantity quality. Even in a direct sale pattern, an agri-food involves at least four actors, contract different actors may be different. Here, we present four-echelon that consists one agricultural producer, processing enterprise, distributor, many consumers. We also analyze decision each actor based Stackelberg game theory...

We investigated a giant magnetoresistance (MR) effect of two-dimensional electron gas systems subjected to periodically modulated magnetic field. It is found that the MR ratio such system shows strong dependence on space between potentials. With increase in number periods, maximal tends be enhanced and peak locates at specific relative Fermi energy for given Moreover, odd-period configurations always larger than even-period configurations.

Recent experiments have tuned the monolayer $1{\mathrm{T}}^{\ensuremath{'}}\text{\ensuremath{-}}{\mathrm{WTe}}_{2}$ to be superconducting by electrostatic gating. Here, we theoretically study phonon-mediated superconductivity in via charge doping. We reveal that emergence of soft-mode phonons with specific momentum is crucial give rise electron-doping regime, whereas no such and emerge hole-doping regime. also find a dome, which can attributed change Fermi surface nesting conditions electron...

We investigated the magnetism and aggregation trends in cubic Zn 1-x Cr x S using density-functional theory calculations.We demonstrate that all studied configurations show ground state half-metallic ferromagnetism (HMF); impurities are energetically favorable to planar cluster into delta-doping structures.The single-layer structures of 0.75 0.25 0.875 0.125 ferromagnetic stabilization energies (∆E AF ) 0.551 0.561 eV/Cr-Cr pair, respectively.The half-layer structure double-layer ∆E 0.394...

Based on density functional theory and perturbation calculations, we systematically investigate the vibration responses of h-BN sheet to charge doping external strains. It is found that under hole doping, phonon frequencies ZO TO branches at different wave vector q shift linearly with slopes. Under electron although irregularly, shifting values are vectors. Interestingly, find strain can restrain irregular doping. The critical factor revealed be relative position nearly free boron p(z)...

We demonstrate the distorted K1 soft mode for phonon instability of single layer hexagonal-BN sheet under tension, which is different from well known failure mechanism graphene. also investigate influences charge doping on instability. Meanwhile, ideal strength found to be larger both p- and n-type doped h-BN sheet, reflecting electronic strengthening effect as similar Our results reveal a that graphene can serve references future applications sheet.

Monolayer $1{T}^{\ensuremath{'}}\ensuremath{-}{\mathrm{WTe}}_{2}$ attracts rapidly growing interests aiming for promising applications in spintronics, dissipationless transport, and quantum computations. Due to one-dimensional W-W chains, exhibits unique anisotropic structure properties, which can be modified by simply applying strains. Based on first-principles calculations, we systematically study the phonon dispersion curves as well Raman-active modes of under different tensile We find...

By using the 3-point QCD sum rules, we calculate transition form factors of $D$ decays into spin triplet axial vector mesons $a_1(1260)$, $f_1(1285) $, $f_1(1420)$. In calculations, consider quark contents each meson in detail. view fact that isospin $a_1(1260)$ is one, $D^+ \rightarrow a_1^0 (1260)$ and $D^0 a_1^- separately. case $ f_1(1285), f_1(1420)$, mixing between light flavor $SU(3)$ singlet octet taken account. Based on obtained here, give predictions for branching ratios relevant...

Using a gas-evaporation technique with an induction-heating method, Zn fine particles were prepared. Transmission electron microscopic observations showed that spherical form are about 80 nm in diameter. X-ray diffraction revealed the particle is composed of core and ZnO coating. Raman scattering from coated variable thickness was measured, broad peak observed. The shifts to lower-frequency side increase oxide thickness. To explain experimental results, frequencies optical-surface phonons...

Through a series of first-principles calculations, we reveal the doping stabilities strained TiSe2 in both normal and charge density wave (CDW) states. Two critical carrier concentrations are revealed for electron hole dopings. The first one corresponds to situation when CDW transition is totally eliminated after doping, while second becomes structurally unstable due doping. We systematically investigate quantitatively modulations on these two by biaxial strains. Our study serves as an...

We study the electronic structure and magnetic properties of equilibrated distorted Co2MnSi1−xAlx using density-functional theory calculations. find that Co2MnSi shows true half-metallicity while Co2MnAl traditional ferromagnetism. The tensile stress deteriorates Co2MnSi, it induces a transition from ferromagnetism to for Co2MnAl. intermediate alloys show compromise between pure Detailed studies stretch enhances splitting t2g orbital has little influence on eg all alloys. Finally, we deduced...

In the minimal supersymmetric standard model (MSSM) with complex parameters, loop effects can lead to $\mathrm{CP}$ violation. We calculate rate asymmetries of decays charginos into lightest neutralino and a W boson on basis most important contributions in third generation squark sector. It turns out that violating be few percent typical regions parameter space MSSM. These processes would provide very promising channels for probing violation MSSM at future high-energy colliders.