A Clar set of a benzenoid graph B is a maximum set of independent alternating hexagons over all perfect matchings of B. The Clar number of B, denoted by Cl(B), is the number of hexagons in a Clar set for B. In this paper, we first prove some results on...

Last stage blades are a key element of steam turbines and in many ways determine the turbine configuration alongside with the overall turbine performance. The total efficiency of the low pressure turbine section can be increased by extending the last stage blades. The design p...

We consider the Fisher equation for advance of advatageous gene with non-Lipschitzian reaction term. We prove new travelling wave profiles and the convergence of the Cauchy problem to one of those profiles.

The contribution deals with Ga doped ZnO films (deposited from a sintered target composed of 99.0 ZnO and 1.0wt % of Ga2O3) prepared by pulsed laser deposition (PLD). Experimentally were compared the deposition parameters influence on structural, optical and electrical properties. The v...

The main goal of this project is to make accessible archival resources from the Czech-Bavarian border region using state-of-the-art information technologies. It will be possible to search information based on geolocation. We also focus on a clear presentation and an effective search of&...

Nitrido silicates are emerged as highly efficient luminescent materials (phosphors) that found considerable industrial application as white light emitting diodes (LEDs) have been studied with respect to band structure and related electronic structure parameters. They have tunable optical properties, as&...

We employ the full-potential linearized augmented plane wave (FLAPW) method as implemented in the WIEN2k code for calculating structural, electronic, vibrational and photocatalytic properties of strained MoS2, MoSe2 and MoTe2 monolayers. Compressive strain of 1.5% for MoS2, 1% for MoSe2, and ...

Using first principles density functional theory (DFT) calculation, the structural, electronic, optical and elastic properties of cubic Ca2Nb2O7 pyrochlore oxide is studied by highly accurate full potential augmented plane wave method with GGA+U approximation. The calculated lattice parameter is in&#x...

We present electronic structure and thermoelectric behavior for the PbS1-xTex (x= 0, 0.25, 0.50, 0.75, 1.0) using all electron full potential linearized augmented plane wave (FPLAPW) method. The correct value of the band gap is achieved with fully relativistic calculation by employing s...

We have investigated the electronic structure of the dilute magnetic semiconductor (DMS) Ga0.98Mn0.02P and compared it to that of an undoped GaP reference sample, using hard x-ray photoelectron spectroscopy (HXPS) and hard x-ray angle-resolved photoemission spectroscopy (HARPES) at energies of ab...

GeTe is the simplest known binary ferroelectric semiconductor with a narrow band gap. Below 700 K it assumes a non-centrosymmetric rhombohedral structure in which an electric dipole is formed due to a relative Ge/Te sublattice displacement along the [111] direction. Ferroelectric polari...

WestudythemagneticComptonprofile(MCP)ofthedisorderedFe0.5Ni0.5 andoftheorderedFeNialloysand discusstheinterplaybetweenstructuraldisorderandelectroniccorrelations.Thecoherentpotentialapproximation is employed to model the substitutional disorder within the single-site approximation, while local electronic correlations are captured with the dynamical mean field theory. ...

For the generation of spin-polarized photocurrents in topological insulators, a coupling between photon angular momentum and electron spin is often assumed. Such a coupling seems to be supported by dichroism reported in E(ky)-intensity maps in photoemission. We show in three dimensional two-...

Various apparative developments extended the potential of angle-resolved photoemission spectroscopy tremendously during the last two decades. The following article reviews the corresponding recent theoretical developments in the field of angle-resolved photoemission with a special emphasis on correlation effects,...

The dilute magnetic semiconductors have promise in spin-based electronics applications due to their potential for ferromagnetic order at room temperature, and various unique switching and spin-dependent conductivity properties. However, the precise mechanism by which the transition-metal doping produces fe...

Femtosecond laser excitations in half-metal (HM) compounds are theoretically predicted to induce an exotic picosecond spin dynamics. Femtosecond spin dynamics experiments performed on Fe 3 O 4 by time- and spin-resolved photoelectron spectroscopy support our model. Furthermore, the spin polarization&#...

We compute the thermal conductivity and electrical resistivity of solid hcp Fe to pressures and temperatures of Earth’s core. We obtain thermal and electrical conductivities that are consistent with experiments considering reasonable error. The predicted thermal conductivity is reduced from previ...

The nanopowders of ZnO coded Al and Cd were synthesized by thermal decomposition and were characterized by XRD. The measured optical properties point to a band gap of 3.23-3.12eV. By the hydrogenation of ZnO, we were able to stabilize the magnifying phase as confirmed by ...

The control of the electron spin by external means is a key issue for spintronic devices. Using spin- and angle-resolved photoemission spectroscopy (SARPES) with three-dimensional spin detection, we demonstrate operando electrostatic spin manipulation in ferroelectric α-GeTe and multiferroic Ge1−xMnxTe.&#x...

PhotoEmission Spectroscopy (PES) is a surface sensitive technique within the Ultra-Violet regime. A way to make it more bulk sensitive consists in increasing the photon energy for entering the X-ray regime. As a counterpart, this increase breaks the k-conserving dipole selection rule an...