Materials Literature
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The stability of the kagome-ice insulator against the three dimensionality and the canting angle of the spin anisotropy axes is studied numerically using the exact diagonalization method. The kagome-ice insulator, which was recently found at 2/3 electron filling in the double-exchange model on a kagome lattice, is a C…
We report on magnetic properties of field-aligned polycrystalline samples of Li 2 ZrCuO 4 which was regarded as a quasi one-dimensional (1D) frustrated magnet with a ferromagnetic nearest neighbor and an antiferromagnetic next-nearest neighbor exchange interactions. We observed the entire magnetization curves to the s…
In the title compound, catena-poly[bis[(2,2'-bipyridine-κ(2)N,N')(1,1,3,3-tetracyano-2-ethoxypropenido-κN)copper(II)]-μ4-hexanedioato-κ(6)O(1),O(1'):O(1):O(6),O(6'):O(6)], [Cu2(C9H5N4O)2(C6H8O4)(C10H8N2)2]n, the adipate (hexanedioate) dianion lies across a centre of inversion in the space group P1. The Cu(II) centre a…
The rapid transformation and synthesis of metal nanoparticles which reaction completes within 5 min by a photocatalytic nanostructured silicon (Si) surface is studied. The Si substrate provides excess electric carriers to the surface upon optical illumination, directly inducing redox reaction. Spherical silver (Ag) na…
The interband optical absorption in Si/SiO2 quantum wells is calculated as function of the well width (W) and the evolution from an indirect to a direct gap material as function of the well width is investigated. In order to compute the electron states in the conduction band, the 30-band k ⋅ p model is employed, where…
A real-time dynamic model representing the pressurized fuel cell gas turbine hybrid system emulator test rig at Thermochemical Power Group (TPG) laboratories of the University of Genoa has been developed to study the fuel cell behavior during different critical operative situations like, for example, load changes (ram…
Abstract The present paper deals with the sliding wear behaviour of prealloyed chromium sintered steel (Fe-1.5Cr-0.2Mo) with graphite powder added in the amount of 0.7%. The wear characteristics, such as profilograms, wear tracks morphology and wear curves of the as sintered specimens and TiCN coating were investigate…
Chemical looping combustion (CLC) is a novel combustion technology that offers a highly efficient route towards clean combustion of fuel with inherent CO2 capture. In CLC, a fuel is combusted in reducer reactor in contact with an oxygen carrier (typically a metal oxide) and subsequently re-oxidized by air in oxidizer.…
Volumetric muscle loss (VML) in skeletal muscle and loss of cardiac function after myocardial infarction lack viable treatment options for functional tissue restoration. Previously investigated strategies such as synthetic graft placement and cell therapy are limited in their ability to restore function to these tissu…
Research activities on the combustion of synthetic jet fuels and bio-derived jet fuels have increased notably over the last 10 years in order to solve the challenging reduction of dependence of air transportation on petroleum. Within the European Community’s Seventh Framework Programme, the combustion of a 100% GtL fr…
To investigate the phase transitions in TbFe 2 Al 10 which is an isomorphic compound of CeT 2 Al 10 (T=Ru, Os) showing a novel second-order phase transition, we carried out specific heat and ultrasonic measurements on a single-crystalline sample. We found a -type sharp peak at 16.6 K and a shoulder-like anomaly at 8.0…
A hole-doped Hubbard model on anisotropic triangular lattices is studied using a variational Monte Carlo method, to elucidate origins of superconductivity and a crossover between Fermi-liquid and non-Fermi-liquid metals, observed in κ-(BEDT-TTF)4Hg2.89Br8. As trial wave functions, we consider correlated BCS states wit…
We theoretically demonstrate photomanipulation of the ground state of a novel nanotubular assembly, [Pt(C2H8N2)(C10H8N2)I]4(NO3)8, which consists of platinum-iodide chains bound via organic bridges into square prisms. Its ground state turns out a mixture of two distinct mixed-valent phases, which have different optica…
Electrical resistivity ρ, magnetic susceptibility χ and specific heat C of Pr(Rh 1-x Co x ) 2 Zn 20 for 0 ≤ x ≤ 0.89 were measured to study the mechanism of simultaneous superconducting and antiferroquadrupolar (AFQ) transitions at T c = T Q = 0.06 K in PrRh 2 Zn 20 .A broad peak in the magnetic specific heat C m (T)…
Total-atomic magnetizability obtained from Quantum theory of Atoms in Molecules (QTAIM) prepares viewpoint to the electronic current density summation in atomic basin and between adjacent atomic basins. The authors present a theoretical investigation of the relationship between the magnetizabilities and the 13 C NMR c…
YbNi3Ga9 is an intermediate-valence compound with a high Kondo temperature of TK = 570 K. Since the Yb-valence is +2.46, YbNi3Ga9 is a suitable compound for investigation of the tuning of Kondo temperature using pressure or chemical substitution. In this regard, we study the effect of substitution of Co for Ni in YbNi…
In order to investigate the anisotropy of the pressure-induced antiferroquadrupole ordered phase of CeTe, we carried out magnetization measurements under high pressure for three field directions of [001], [110], and [111]. The results show that the transition temperature is the highest for H ‖ [110] and the lowest for…
Due to the large refractive index of ZnO material, light extraction efficiency (LEE) of ZnO based light-emitting diode (LED) is limited by the total reflection. We present a combined experimental and computational approach to study the effects of integrated surface textures on the efficiency of light extraction from t…
We investigated low-energy spin fluctuations in the triangular-lattice Heisenberg antiferromagnets CuCrO 2 and Cu 0.85 Ag 0.15 CrO 2 by inelastic neutron scattering. We found that the excitation spectra have diffusive quasielastic components in addition to damped spin waves in regimes where the two-dimensional spin co…
In view of the pseudogap in underdoped cuprate superconductors, we study the stability of a staggered flux state SF against the conventional metallic state as the normal state which underlies the d-wave superconductivity, using a variational Monte Carlo method. We focus on the effect of diagonal hopping term (t 0 ) in…