A theoretical model is developed to account for the anomalies reported thermal conductivity (κ) of high-TcYBa2Cu3O7−δ cuprate superconductors. We begin with lattice by incorporating scattering phonons defects, grain boundaries, tunnelling states, charge carriers and in Hamiltonian. The dominating this an artifact strong phonon states impurity mechanism below Tc. Later on, electrons impurities investigated order assess their role conduction. also look spin-wave (magnon) contribution...

The temperature-dependent normal state resistivity of single-crystal Nd1.85Ce0.15CuO4−δ is theoretically analysed within the framework classical electron–phonon model resistivity, i.e. Bloch–Gruneisen model. Due to inherent acoustic (low-frequency) phonons (ωac) as well high-frequency optical (ωop), contributions have first been estimated. oxygen-breathing mode yield a relatively larger contribution compared phonons. estimated by considering both phonons, ωac and ωop, along with zero limited...

Quantum computers for the efficient simulation of physical systems are emerging today.Effect Spin on Dots (QDs) paved way QCA.Quantum-dot cellular automata (QCA) have a simple cell as basic element.The is used building block to construct gates and wires.Reversible logic has extensive applications in quantum Computing.Reversible widely being considered potential design style implementation modern nanotechnology computing with minimal impact entropy.Reversible such Fredkin DKG can be great use...

Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Jaiveer Singh, Netram Kaurav, K. Choudhary, Gunadhor S. Okram; Synthesis optical properties of silver nanoparticles. AIP Conference Proceedings 31 July 2015; 1670 (1): 030034. https://doi.org/10.1063/1.4926718 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote...

The tokamak concept is the frontrunner for achieving controlled thermonuclear reaction on earth, an environment friendly way to solve future energy crisis. Although much progress has been made in controlling heated fusion plasmas (temperature ∼ 150 million degrees) tokamaks, technological issues related plasma wall interaction topic still need focused attention. In future, reactor grade operational scenarios, and target plates are expected experience a heat load of 10 MW/m2 even more during...

We use the Kubo model to calculate lattice contribution thermal conductivity (κ ph ) in MgB 2 superconductors. The theory is formulated when heat transfer limited by scattering of phonons from defects, grain boundaries, charge carriers, and phonons. normal state superconductors dominates an artifact strong phonon-impurity -phonon mechanism. Later on, electronic e calculated within relaxation time approximation for π σ band carriers with s wave symmetry. Such estimate sets upper bound on κ...

We evolve a theoretical model for quantitative analysis of decrease in thermal conductivity (κ) by embedding ErAs nanoparticles In 0.53 Ga 0.47 As crystalline semiconductors. The lattice incorporating the scattering phonons with defects, grain boundaries, electrons, and Hamiltonian are evaluated. It is noticed that provide an additional mechanism phonons. semiconductors, phonon point defects boundaries become more efficient, which cause up to half its value pure crystal. Conclusively,...

The temperature-dependent specific heat C[Formula: see text](T) of nanocrystalline (NC) Cu (8 nm) and Pd (6 is theoretically analyzed compared with the their corresponding bulk materials in temperature range from 150 K to 300 K. It revealed that text] values NC (Pd) are about 10% (40%) higher as form, softening phonon frequencies at interfaces argumented main mechanism responsible for enhancement present work. Lattice (phonon) obtained following an overlap repulsive potential using Debye...

We investigate the temperature-dependent normal state resistivity of single-crystal K3C60 within framework polaronic conduction charge carriers. The electrical below 100 K can be well fitted by ρe−ph = [Eωs/sinh2(ωs/kBT)] with ωs as 110 softest optical phonon mode and E being a constant. Resistivity behaviour is consistent small-polaron coherent motion, which involves relaxation due to soft that strongly coupled electrons carriers in doped fullerides. estimated contribution resistivity, when...

Nanoparticles of Copper (Cu) have attracted great interest in recent years because their unique physical and optical properties that are industrial importance. To understand basic properties, Cu nanoparticles were synthesized by Polyol method. The powder was characterized X-ray diffraction (XRD) Fourier Transform Infrared Spectroscopy (FTIR). average particle size lattice parameter estimated XRD found to be ~42.5 nm 3.617 Å respectively. results suggest suitability these as dopants other...

Transport properties of FeTe parent compound has been investigated by measurements electrical resistivity, magnetic susceptibility and Seebeck coefficient. The sample was synthesized through a standard solid state reaction route via vacuum encapsulation characterized x-ray diffraction, which indicated tetragonal phase with space group P4/nmm. does not exhibit superconductivity but shows an anomaly in the resistivity measurement at around 67 K, corresponds to structural transition along...

Bi2Te3 nanoparticles exhibit size dependent thermoelectric properties which gives an opportunity to tune the for optimization of figure merit (ZT). We have quantitatively analyzed using phonon scattering mechanism by incorporating phonons with defects, grain boundaries, electrons and Umklapp scatterings. The maximum value ZT = 0.92 is obtained at T 400 K 30 nm in comparison 0.45 150 same temperature. With decrease interface volume ratio increases increase scatterings boundaries point results...

Based on the advancement in current thermonuclear fusion research, it is quite likely that future generation machines, DEMO and beyond, will be operating with tungsten alloys based as plasma facing material their walls targets to dissipate thermal well particle loads under extreme operational conditions. Tungsten being preferred because of its superior thermo-mechanical properties, chemical resistance for low tritium retention capabilities. However, use pure a structural itself substantially...

We report synthesis of a double perovskite La2CoTiO6 (LCTO) compound by citrate route method with varying sintering temperature as 900, 1100, and 1350 °C for 24 h. The structure LCTO was confirmed via X-ray diffraction (XRD) analysis. lattice parameter, unit cell volume bond length were refined means Rietveld An evolution structural change from orthorhombic to monoclinic identified respect temperature. Also the particle size found be increasing