Materials Literature
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The spin polarization of electrons trapped in InAs self-assembled quantum dot ensembles is investigated. A statistical approach for the population of the spin levels allows one to infer the spin polarization from the measure values of the addition energies. From the magneto-capacitance spectroscopy data, the authors f…
Quantum phase is not a direct observable and is usually determined by interferometric methods. We present a method to map complete electron wave functions, including internal quantum phase information, from measured single-state probability densities. We harness the mathematical discovery of drum-like manifolds bearin…
The optical properties of hybrid molecules composed of semiconductor and metal nanoparticles with a weak probe in a strong pump field are investigated theoretically. Excitons in such a hybrid molecule demonstrate novel optical properties due to the coupling between exciton and plasmon. It is shown that a non-absorptio…
Electronic ferroelectricity from charge ordering (CO) is currently a significant issue that has been extensively investigated in the charge/spin frustrated LuFe2O4 system. Chemical substitution and structural layer intercalation have been considered as potentially effective approaches in our recent study, and we herei…
We have measured the electrical resistivity and the magnetoresistance (MR) of the single-component molecular metal [Ni(tmdt) 2 ] at high magnetic fields. The temperature dependence of the resistivity shows a T 2 behavior up to 30 K, but this is difficult to explain in terms of the simple Fermi liquid picture. We find…
This study reports the structural and the magnetic properties of Zn1-xFexO (ZnFeO) films with Fe composition ratios of 0.03 - 0.07. High-quality Zn1-xFexO thin films with a mean thickness of 500 nm were fabricated on alpha-sapphire (0001) substrates by RF magnetron sputtering. The structures of the ZnFeO thin films we…
We study the effect of the solvent (water) on the ligand exchange reaction (LER) step of Pt(II) complexation to PAMAM dendrimers. The results suggest that aquation of tetrachloroplatinate anion (PtCl(4)(2-)) inside PAMAM outer pockets occurs prior to its reaction with dendrimer atom binding sites. Thus, the active inv…
The metal-to-insulator (MI) transition of a V2O3 thin film is studied, using a surface acoustic wave delay line. The V2O3 film covers not only the sound path but also one of the interdigital transducers (IDTs). The resulting mismatch of the IDTs detunes the delay line, until the film passes through the MI transition.…
The nonreciprocal directional dichroism derived from the optical magnetoelectric effect has been investigated for the f – f transitions of Nd 3+ ion in a ferroelectric Nd 2 Ti 2 O 7 single crystal under magnetic field, in which both space-inversion and time-reversal symmetries are viewed as simultaneously broken. The…
Whipple’s solution of the problem of grain boundary diffusion and Le Claire’s relation, which is often used to determine grain boundary diffusion coefficients, are examined for a broad range of ratios of grain boundary to bulk diffusivities Δ and diffusion times t. Different reasons leading to errors in determining th…
This paper provides a comparison of the performance of eight industrial softeners using equal amounts of softeners and also at three different manufacturers recommended concentrations before and after five home laundering cycles. Four non-siloxane softeners containing anionic, non-ionic, cationic, and non-ionic polyet…
Glass fibers with a diameter of 100–200μm are drawn by just pulling up melts of 30BaO–15TiO2–55GeO2 glass, and transparent crystallized glass fibers consisting of nonlinear optical Ba2TiGe2O8 crystals are fabricated by crystallization of glass fibers. It is clarified from linearly polarized micro-Raman scattering spec…
Ti C x thin films were deposited on Al2O3 substrates at 900°C by using a multiple cathode high current pulsed cathodic arc. The Ti:C pulse ratio and, hence, the composition was varied from C rich to Ti rich. It is found that the Al2O3 substrate is decomposed and reacts with the TiCx film to incorporate significant amo…
Through the full potential linearized augmented plane wave method, we have explored the possibility of defect-induced magnetism in wurtize GaN. The N vacancy defect structure has no sign of a magnetic state. Nonetheless, very interestingly it has been found that the GaN with a Ga vacancy defect can show induced local…
The S-parameter retrieval has proved to be an efficient approach to obtain electromagnetic parameters of metamaterials from reflection and transmission coefficients, where a slab of metamaterial with finite thickness is regarded as a homogeneous medium slab with the same thickness [D. R. Smith and S. Schultz, Phys. Re…
We present a study of the structural and the optical properties of nitrogen-ion-implanted ZnO nanorods. Vertically-aligned ZnO nanorods were synthesized on Al2O3 substrates by using a catalyst-free metal-organic chemical vapor deposition (MOCVD) procedure. Nitrogen ions with an energy of 120 keV and an ion flux of 1 x…
Aim of this work is to model electrostatically doped carbon nanotubes (CNT), which have recently proved to perform as ideal PN diodes, also showing photovoltaic properties. The new model is able to predict the optical absorption of semiconducting CNT as function of size and chirality. We justify theoretically, for the…
We formulate a viscoelastic theory for interconnected microphase separated structures such as a double gyroid in diblock copolymer melts. We consider the energy increase and the energy dissipation due to the deformation of interconnected periodic domains. The dominant elastic part agrees with previous analytical resul…
Magnetocaloric effects of Ni2.15Mn0.85−xCuxGa (x=0.05,0.07) alloys were investigated with both experimental and theoretical approaches. The experiments show that these alloys have large entropy changes and refrigeration capacities with the field change of 2T. Further theoretical analysis indicates that both magnetic e…
We used electron spin resonance (ESR) and electrical conductivity measurements to track the stability of poly(3,4-ethylene dioxythiophene): poly(styrene sulfonate) (PEDOT:PSS) and ethylene glycol (EG)-treated PEDOT:PSS (EG-PEDOT:PSS) films in air. We observed that the ESR intensity of the PEDOT:PSS films decreased in…