Materials Literature
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We present shear mechanical and dielectric measurements taken on seven liquids: triphenylethylene, tetramethyltetra-phenyltrisiloxane (Dow Corning 704 diffusion pump fluid), polyphenyl ether (Santovac 5 vacuum pump fluid), perhydrosqualene, polybutadiene, decahydroisoquinoline (DHIQ), and tripropylene glycol. The shea…
To cap it all off: Colloidally stable hydrophilic 1D CdTe nanostructures (see picture) have been easily prepared under aqueous conditions in the presence of capping thiol ligands. The present methodology shows a strong dependence on the concentration of the precursors and the molecular structure of the ligand.
The structural, electrical and optical properties of RF sputtered In 2 O 3 : Sn (ITO) thin films and the effect of post-deposition annealing have been studied. The thickness ranges from 225 to 862 nm. X-ray diffraction, scanning electron microscopy (SEM) and atomic force microscopy (AFM) experiments were performed to…
Suspendiert: Schwach hydrophobe Siliciumoxid-Partikel stabilisieren Emulsionen, indem sie dicht gepackte Monoschichten an der Grenzfläche der Tröpfchen bilden, die als sterische Barriere gegen Koaleszenz wirken. Dagegen stabilisieren stark repulsive Partikel Emulsionen durch spontane Organisation in dichten Monoschich…
In order to gain some insight on the electronic relaxation mechanisms occuring in diamond under high intensity laser excitation and/or VUV excitation, we studied experimentally the pulsed conductivity induced by femtosecond VUV pulses, as well as the energy spectra of the photoelectrons released by the same irradiatio…
We reconsider the long-standing problem of the effect of spin fluctuations on the critical temperature and isotope effect in a phonon-mediated superconductor. Although the general physics of the interplay between phonons and paramagnons has been rather well understood, the existing approximate formulas fail to describ…
In this Rapid Communication we show the relationship between surface plasmon resonance damping and the intensity of surface bonding for capped Au nanoparticles, (NPs). Up to now the influence of capping has been included as a phenomenological modification of the scattering constant. It is indicated here that the effec…
Materials that combine magnetic and ferroelectric properties have generated increasing interest over the last few years, due to both their diverse properties and their potential utility in new types of magnetoelectric device applications. In this review we discuss recent progress in the study of such magnetoelectric m…
The shot noise of current through a metallic double quantum dot structure exhibiting negative differential conductance is studied. We can exactly solve the master equation and derive an analytical expression of the spectral density of current fluctuations as a function of frequency in the first Coulomb staircase regio…
We have investigated magnetic, electrical, and thermal transport properties (Seebeck effect and thermal conductivity) of ${\mathrm{LaSr}}_{2}{\mathrm{Mn}}_{2\ensuremath{-}y}{\mathrm{Cr}}_{y}{\mathrm{O}}_{7}$ polycrystalline samples ($y=0.1$, 0.2, 0.4, and 0.6). The ${\mathrm{Cr}}^{3+}$ substitution for ${\mathrm{Mn}}^…
We study a one-dimensional fluid of hard-rods interacting each other via binary inelastic collisions and a short ranged square-well potential. Upon tuning the depth and the sign of the well, we investigate the interplay between dissipation and cohesive or repulsive forces. Molecular dynamics simulations of the cooling…
A method, based on the N\'eel-Brown model of thermally activated magnetization reversal of a magnetic single-domain particle, is proposed to study the field-sweep-rate dependence of the coercive field of single-molecule magnets (SMMs). The application to ${\mathrm{Mn}}_{12}$ and ${\mathrm{Mn}}_{84}$ SMMs allows the de…
A modified model of metal-semiconductor contacts is applied to analyze the capacitance-voltage and current-voltage characteristics of metal-ferroelectric-metal structures. The ferroelectric polarization is considered as a sheet of surface charge situated at a fixed distance from the interface. The presumable high conc…
This work presents the in-plane thermal-conductivity data for pure as well as boron-doped (1.6×1021∕cm3), arsenic-doped (2.3×1020∕cm3), and phosphorus-doped (2.3×1020∕cm3) silicon layers of thickness 30nm in the temperature range of 300–450K. The steady-state Joule heating and electrical resistance thermometry are use…
We studied ion beam mixing and He accumulation in Cu∕Nb multilayer thin films after 33keV He implantation at room temperature to a dose of 1.5×1017atoms∕cm2. Multilayered thin films consisting of alternating Cu and Nb layers were produced by magnetron sputtering. Two types of samples, one with an individual layer thic…
We present a systematic study of growth, structural, and magnetic characterization of $\mathrm{GaN}:\mathrm{Gd}$ layers grown directly on 6H-SiC(0001) substrates by reactive molecular-beam epitaxy with a Gd concentration ranging from $7\ifmmode\times\else\texttimes\fi{}{10}^{15}$ to $2\ifmmode\times\else\texttimes\fi{…
Transport and magnetic properties have been studied in two sets of sol-gel prepared Pr1∕2Sr1∕2MnO3 nanoparticles having an average particle size of 30 and 45nm. Our measurements suggest that the formation of a charge-ordered state is largely affected due to lowering of the particle size, but the ferromagnetic transiti…
The comments of Guseinov on our paper (T. Ozdogan, S. Gumus and M. Kara, J. Math. Chem., 33 (2003) 181) are critically analyzed. Contrary to his comments, it is proved that the expansion formula for the product of two normalized associated Legendre functions in ellipsoidal coordinates and the expressions for two-cente…
We present a study of the charge transmission behavior of a series of dithiol polyenes in the context of molecular junctions. Using the Landauer theory and zero voltage approximation the Green's functions of the inserted molecules are calculated from a fully ab initio wave function based procedure. Various possibiliti…
We calculate the height dependence of recombination energies, polarization and radiative lifetimes of the optical transitions of various excitonic complexes: neutral excitons (X^0), negatively- (X^-) and positively-charged (X^+) trions, and biexcitons (XX^0) in lens-shaped, self-assembled In_0.6Ga_0.4As/GaAs quantum d…