Materials Literature
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Investigations of photoluminescence (PL) in the magnetic field of quantum structures based on the ZnSe quantum well with asymmetrical ZnBeMnSe and ZnBeSe barriers reveal that the introduction of Be into semimagnetic ZnMnSe causes a decrease of the exchange integrals for conductive and valence bands as well as the form…
We report measurements of the magnetic, transport, and thermal properties of the Heusler-type compound ${\text{Fe}}_{2}{\text{VAl}}_{0.95}$. We show that while stoichiometric ${\text{Fe}}_{2}\text{VAl}$ is a nonmagnetic semimetal a 5% substitution on the Al site with the $3d$ elements Fe and V atoms leads to a ferroma…
The dual role of graphene (or reduced graphene oxide) as atomic template and structural scaffold in the nucleation and assembly of organic nanostructures is demonstrated. The π-π stacking interactions between graphene and aromatic organic molecules affords synergistic binding interactions, with the host and guest assu…
We introduce a new concept for a nanomaterial in terms of both synthesis and properties. The nanomaterial, aggregates of ceria particles around central silver metal (CeO(2)-Ag), was fabricated by a one-pot selective redox reaction using cerium(III) and silver(I) autocatalyzed by silver metal without the need for surfa…
The optical properties of nanocrystals are drastically changed by the interaction with adjacent metal nanoparticles. By time-resolved photoluminescence spectroscopy, we investigate CdSe multishell nanocrystals coupled to self-assembled films of Au nanoparticles. The distance between emitter and metal is adjusted by co…
A general multiband formulation of the linear and nonlinear optical response functions for realistic models of correlated crystals is presented. Dipole-forbidden d-d optical transitions originate from vertex functions, which we consider assuming the locality of an irreducible four-leg vertex. The unified formulation f…
The magnetic correlations in the quasi-two-dimensional (2D) spin-$\frac{1}{2}$ square-lattice system ${\text{Zn}}_{2}\text{VO}{({\text{PO}}_{4})}_{2}$ have been investigated by neutron-diffraction technique. A long-range antiferromagnetic (AFM) ordering below 3.75 K $({T}_{N})$ has been observed with a reduced moment…
Supercooled liquids display fascinating properties upon cooling such as the emergence of dynamic length scales. Different models strongly vary with respect to the choice of the elementary subsystems as well as their mutual coupling. Here we show via computer simulations of a glass former that both ingredients can be i…
In order to establish a link between various structural and kinetic properties of metals and the crystal–melt interfacial mobility, free-solidification molecular-dynamics simulations have been performed for a total of nine embedded atom method interatomic potentials describing pure Al, Cu and Ni. To fully explore the…
Near infrared (NIR; 660-1300 nm) long-persistent phosphorescence from Cr(3+) ions with persistence time of more than 1 hour was realized in La(3)Ga(5)GeO(14):Cr(3+) phosphor (with or without co-dopants such as Li(+), Zn(2+), Ca(2+), Mg(2+) and Dy(3+)). The NIR phosphorescence can be effectively achieved under UV illum…
Polycrystalline, sintered samples of p-type AgSbSe x Te 2−x ( x = 0−0.04) were prepared from high purity elements by a melt-quench technique followed by spark plasma sintering. X-ray diffraction and differential scanning calorimetry thermal analysis indicate that a small amount of Se doping ( x ≥ 0.02) can effectively…
Abstract Advances in functionality and reliability of nanocomposite materials require careful formulation of processing methods to ultimately realize the desired properties. An extensive study of how the variation in fabrication process would affect the mechanism of conductivity and thus the final electrical propertie…
By applying density functional theory, we find strong evidence for an itinerant nature of magnetism in two families of iron pnictides. Furthermore, by employing dynamical mean field theory with continuous time quantum Monte Carlo as an impurity solver, we observe that the antiferromagnetic metal with small magnetic mo…
We present a first-principles study of the migration and recombination of edge defects (carbon adatom and/or vacancy) and their influence on electrical conductance in zigzag graphene nanoribbons (ZGNRs). It is found that at room temperature, the adatom is quite mobile while the vacancy is almost immobile along the edg…
QED-model for the multichain qubit system with interactions of qubits and chains between themselves on the example of the system of $σ$-polarons in carbon zigzag nanotubes, interacting with quantized EM-field, is considered analytically. The possibility of experimental detection of Rabi waves in conventional stationar…
Spectra of octadecylamine (ODA) Langmuir monolayers and egg phosphatidylcholine (PC)/ODA-mixed monolayers at the air-water interface have been acquired. The organization of the monolayers has been characterized by surface pressure-area isotherms. Application of polarized optical microscopy provides further insight in…
Rabi waves have been experimentally registered for the first time by Raman scattering studies of zigzag nanotubes, produced by high energy ion beam modification of natural diamond single crystals. Antiferroelectric spin wave resonance has been detected for the first time in Raman spectroscopy practice in given samples…
Implanted 3.25 keV Ar+ ions have been used to modify the in-plane bulk anisotropy in thin films of epitaxially grown Laves phase YFe2. The magneto optical Kerr effect, vibrating sample magnetometry and computational modeling have been used to show that the dominant source of anisotropy changes from magnetoelastic in a…
We investigate how the fixed-node diffusion Monte Carlo energy of solids depends on single-particle orbitals used in Slater-Jastrow wave functions. We demonstrate that the dependence can be significant, in particular in the case of $3d$ transition-metal compounds, which we adopt as examples. We illustrate how exchange…
Patterns of silver metal were prepared on DNA networks by a template-directed selective deposition and subsequent metallization process. Scanning force microscopic observations and XPS investigations demonstrated that uniform networks of nanosized silver metal clusters formed after incubation of DNA LB films with silv…