Materials Literature
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Based on an exact functional form derived for the three-point vertex function $Γ$, we propose a self-consistent calculation scheme for the electron self-energy with $Γ$ always satisfying the Ward identity. This scheme is basically equivalent to the one proposed in 2001, but it is improved in the aspects of computation…
In this paper we discuss effective material parameter description of new nanostructures designed to perform as artificial magnetic materials for vis- ible light. Among these structures there are various split-ring resonators, dual-bar structures, fishnet layers and other geometries. Artificial magnetic response in the…
The class of substitutions of some primitive components is introduced. A bilateral subshift arising from a substitution of some primitive components is decomposed into pairwise disjoint, locally compact, shift-invariant sets, on each of which an invariant Radon measure is unique up to scaling. It is completely charact…
In a recent Letter, Peets, et al. measured the x-ray intensity at the oxygen K-edge in overdoped La$_{2-x}$Sr$_x$CuO$_{4\pmδ}$ (LSCO) and Tl$_2$Ba$_2$CuO$_{6+δ}$. They claimed that, unlike the underdoped samples of LSCO and YBa$_2$Cu$_3$O$_x$ in which the integrated intensity increases at least linearly with doping, i…
Using density functional theory and LDA+U method, we investigate magnetic and electronic structure of Y$_{2}$Ir$_{2}$O$_{7}$ and rare-earth based pyrochlore iridates. Our study reveals that the ground state is a non-collinear magnetic insulating state. Due to strong spin-orbit coupling in Ir 5\textit{d}, there is an u…
The last sentence in the acknowledgement of this Communication should read: G.E.J., E.C.T., and A.W.C. acknowledge the Department of Energy (grant number DE-FG02-92ER14258) and the Airforce Office of Scientific Research (grant number FA 9550-07-1-0151).
This study reports on the synthesis of N-doped carbon spheres (N-CSs) by a simple synthetic \nprocedure. A horizontal CVD type reactor was used to synthesize N-CSs from pyridine. \nDepending on the dilution of the pyridine with toluene, a nitrogen content of 0.13-5 mol % was \nobtained. The use of a vertical CVD react…
The invisibility cloak has been a long-standing dream for many researchers over the decades. By transforming space and light propagation, a three-dimensional (3D) object can be perceived as having reduced number of dimensions, in the form of points, lines, and thin sheets, making it "undetectable" judging from scatter…
The origin of the anomalous, 400% increase of the piezoelectric coefficient in Sc$_x$Al$_{1-x}$N alloys is revealed. Quantum mechanical calculations show that the effect is intrinsic. It comes from a strong change in the response of the internal atomic coordinates to strain and pronounced softening of C$_{33}$ elastic…
Report of the mycological session devoted to aquatic Ascomycota, during october 2009, at Grancey-le-Château (Côte d’Or, France)
A stringent test for an exchange-correlation approximation in electronic structure calculations is the equality between the ionization energy of the neutral system and the affinity of the singly positively charged system. All of the commonly used approximations (local, semilocal, hybrid) for the exchange correlation w…
3.1 Optical Materials 3.1.1 Materials for the infrared A large number of optical materials transmit in the infrared region of the spectrum. However, the list of materials is quite limited when one considers physical characteristics, workability, and cost. Table 3.1 indicates the materials most commonly used in infrare…
The finiteness of diffractive orders of the phase grating and the relations between the diffractive orders and the incident angle are discussed in this article. The distribution of each diffractive order is illustrated at different incident angles, and the diffractive direction of each diffraction wave is given. It is…
Abstract The steel X20CrMoV12.1 has been widely used for the steam pipes in power plants since 1960s. It exhibits a good combination of high‐temperature strength, toughness and creep strength. The microstructure consists of high‐tempered martensite with finely dispersed carbide precipitates along the boundaries of the…
Benthic microalgae sampling in lotic systems is carried out using either artificial or natural substrate. Natural substrate is more suitable for biomass and productivity estimates as well as biodiversity assessment because it contains the communities that are typical of the environment. We present a new gadget for epi…
Self-assembled rodlike (0.3-2.5 microm in diameter and 5.3-31 microm in length) and disklike microstructures (1.8-10.6 microm in width and 0.1-1.0 microm in thickness) are uniquely present in amorphous clay aggregates. Clay units were prepared by intercalation of Na(+)-montmorillonite (Na(+)-MMT) with copper ions (Cu(…
Two different devices topology are proposed to implement parallel-plate capacitors using Ba0.6Sr0.4TiO3 (BST) thin films. At 1 MHz frequency, the maximum tunability 1.3:1 is obtained with 32 V DC bias. The new topology capacitors have much higher tunability compared with conventional capacitors at the same total capac…
Abstract The differential surface excitation probabilities (DSEPs) for medium‐energy electrons traveling in Ag are extracted from reflection electron energy loss spectroscopy (REELS) spectra by using the Werner's elimination‐retrieved algorithm. Based on a surface Kramers–Kronig dispersion relationship, the electronic…
Nontraditional aromatic molecules hold tremendous promise for the design and realization of advanced materials for organic electronics applications. In this report, we describe recent work with the 10 π-electron methano[10]annulene molecule. We used chemistry established by Vogel and by Neidlein to incorporate this mo…
The introduction of a fluorescent chromaphore into bifunctional crosslinkers results in a molecule with normal crosslinker properties and a fluorescent group for straightforward quantification. This work describes the synthesis of the dansyl-labeled heterobifunctional crosslinker N-succinimidyl ε-N-dansyl α-N-(acetylt…