Toshiyuki Matsunaga、Rie Kojima、Noboru Yamada 等 7 位作者2006-02-07Inorganic Chemistry
GeTe(1-x)-Sb2Te3(x) sputtered amorphous film was crystallized into a simple NaCl-type structure through instantaneous laser irradiation over a wide composition range from x = 0 to at least 2/3. When the ratio of Sb2Te3 increases, a vacancy is generated at every Na site for two Sb atoms. The fraction of vacancies, v(x)…
Crystal Structures and PropertiesPhase-change materials and chalcogenidesChalcogenide Semiconductor Thin Films
Wataru Nakao、Shuntaro Mori、Jun Nakamura 等 6 位作者2006-02-07Journal of the American Ceramic Society
To improve fracture toughness and encourage excellent self‐crack‐healing ability, mullite/SiC particle/SiC whisker multi‐composites and mullite/SiC whisker composites were hot pressed. The crack‐healing abilities and mechanical properties of these sintered composites were investigated. Based on the obtained results, t…
MXene and MAX Phase MaterialsAdvanced materials and compositesAdvanced ceramic materials synthesis
Zhijie Xu、Catalin R. Picu2006-02-07Modelling and Simulation in Materials Science and Engineering
The close-range interaction of dislocations and solute clusters in the Al–Mg binary system is studied by means of atomistic simulations. We evaluate the binding energy per unit length of dislocations to the thermodynamically stable solute atmospheres that form around their cores, at various temperatures and average so…
Microstructure and mechanical propertiesAluminum Alloy Microstructure PropertiesHigh Temperature Alloys and Creep
A. Pimenov、A. A. Mukhin、V. Yu. Ivanov 等 6 位作者2006-02-07arXiv
Magnetodielectric materials are characterized by a strong coupling of magnetic and dielectric properties and in rare cases simultaneously exhibit both, magnetic and polar order. Among other multiferroics, TbMnO3 and GdMnO3 reveal a strong magneto-dielectric (ME) coupling and as a consequence fundamentally new spin exc…
Strongly Correlated ElectronsMaterials Science
Oswaldo Diéguez、David Vanderbilt2006-02-07Physical Review Letters
We develop an exact formalism for performing first-principles calculations for insulators at fixed electric polarization. As shown by Sai, Rabe, and Vanderbilt (SRV) [Phys. Rev. B 66, 104108 (2002)], who designed an approximate method to tackle the same problem, such an approach allows one to map out the energy landsc…
Physics of Superconductivity and MagnetismMachine Learning in Materials ScienceElectronic and Structural Properties of Oxides
P. Jiji Thomas Joseph、Prabhakar P. Singh2006-02-07arXiv
First-principles, density-functional-based electronic structure calculations are employed to study the changes in the electronic properties of ZnC_{y}Ni_{3} and MgC_{y}Ni_{3} using the Korringa-Kohn-Rostoker coherent-potential approximation method in the atomic sphere approximation (KKR-ASA CPA). As a function of decr…
Materials ScienceSuperconductivity
Gang Chen、Herbert Lichtenberger、Guenther Bauer 等 5 位作者2006-02-07arXiv
We investigate the initial stage of the 2D-3D transition of strained Ge layers deposited on pit-patterned Si(001) templates. Within the pits, which assume the shape of inverted, truncated pyramids after optimized growth of a Si buffer layer, the Ge wetting layer develops a complex morphology consisting exclusively of…
Materials Science
Y. Shiotani、J. L. Sarrao、Guo-Qing Zheng2006-02-07arXiv
In order to gain insights into the origin of colossal magneto-resistance (CMR) in manganese oxides, we performed a ^{139}La NMR study in the double-layered compound La_{1.2}Sr_{1.8}Mn_2O_7. We find that above the Curie temperature T_C=126 K, applying a magnetic field induces a long-range ferromagnetic order that persi…
Strongly Correlated ElectronsMaterials Science
E. M. Hankiewicz、Giovanni Vignale2006-02-07arXiv
We develop the microscopic theory of the extrinsic spin Hall conductivity of a two-dimensional electron gas, including skew-scattering, side-jump, and Coulomb interaction effects. We find that while the spin-Hall conductivity connected with the side-jump is independent of the strength of electron-electron interactions…
Mesoscale and Nanoscale PhysicsMaterials Science
Barry Zink、R. Pietri、F. Hellman2006-02-07Physical Review Letters
We report the thermal conductivity and specific heat of amorphous silicon thin films measured from 5-300 K using silicon-nitride membrane-based microcalorimeters. Above 50 K the thermal conductivity of thin-film amorphous silicon agrees with values previously reported by other authors. However, our data show no platea…
Nanowire Synthesis and ApplicationsAdvanced Thermoelectric Materials and DevicesThermal properties of materials
G. P. Meisner、Matthew L. Scullin、Michael P. Balogh 等 5 位作者2006-02-07The Journal of Physical Chemistry B
We recently reported the synthesis of a new quaternary hydride in the lithium-boron-nitrogen-hydrogen quaternary phase diagram with the approximate composition LiB0.33N0.67H2.67 having a theoretical hydrogen content of 11.9 wt %. This new compound forms by the reaction of appropriate amounts of lithium amide (LiNH2) a…
Muon and positron interactions and applicationsHydrogen Storage and MaterialsAmmonia Synthesis and Nitrogen Reduction
Y. Y. Huang、S. V. Ahir、E. M. Terentjev2006-02-07arXiv
We report on rheological properties of a dispersion of multi-walled carbon nanotubes in a viscous polymer matrix. Particular attention is paid to the process of nanotubes mixing and dispersion, which we monitor by the rheological signature of the composite. The response of the composite as a function of the dispersion…
Materials Science
Akimasa Sakuma2006-02-07arXiv
A Landau-Lifshitz-Gilbert type equation has been derived by using s-d model in which the s-electron system is regarded as an environment coupled weakly with the localized spins. Based on the irreducible linear response theory, we show that the relaxation function of the s-electron spin leads to the Gilbert type dampin…
Materials ScienceMesoscale and Nanoscale Physics
Malgorzata Wierzbowska、Stefano de Gironcoli、Paolo Giannozzi2006-02-07arXiv
The discontinuities of $T_{c}$ in Niobium under pressure are examined by means of the pseudopotential plane-wave implementation of the electron-phonon coupling calculated from density-functional perturbation theory. Both low- and high-pressure discontinuities of $T_{c}$ have their origin in the Kohn anomalies and are…
SuperconductivityMaterials Science
O. D. Jayakumar、H. G. Salunke、R.M. Kadam 等 6 位作者2006-02-07Nanotechnology
We report the synthesis of nominal 2 and 5 at.% Mn-doped ZnO nanocrystalline particles by a co-precipitation method. Rietveld refinement of x-ray diffraction data revealed that Mn-doped ZnO crystallizes in the monophasic wurtzite structure and the unit cell volume increases with increasing Mn concentration. DC magneti…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsZnO doping and properties
John P. Zimmer、Sang‐Wook Kim、Shunsuke Ohnishi 等 6 位作者2006-02-07OpenAlex
We have developed a size series of unusually small, water-soluble (InAs)ZnSe (core)shell quantum dots (QDs) that emit in the near-infrared and exhibit new behavior in vivo, including multiple sequential lymph node mapping and extravasation from the vasculature. The biological utility of these fluorescent probes result…
Chalcogenide Semiconductor Thin FilmsQuantum Dots Synthesis And PropertiesNanocluster Synthesis and Applications
Houyi Ma、Shaoxin Huang、Xingli Feng 等 9 位作者2006-02-06ChemPhysChem
Building blocks: Poly(N-vinylpyrrolidone)-protected gold nanoparticles synthesized electrochemically were used as “building blocks” to construct varieties of nanostructures (see figure), including well-defined nanorings, single-crystal films and dense particle films.
Molecular Junctions and NanostructuresElectrochemical Analysis and ApplicationsGold and Silver Nanoparticles Synthesis and Applications
Youfan Hu、Xuelei Liang、Qing Chen 等 5 位作者2006-02-06Applied Physics Letters
Amorphous-carbon nanotube (a-CNT) based devices have been fabricated and transport measurements on these devices have been carried out. It was found that the Schottky barrier formed between the metal contact and a-CNT plays a significant role in the transport of a-CNT devices, and electrical characteristics of these d…
Carbon Nanotubes in CompositesTransition Metal Oxide NanomaterialsGraphene research and applications
Sung Kyun Lee、Dietrich Hesse、U. Gösele2006-02-06Applied Physics Letters
(104)-oriented Nd-substituted Bi4Ti3O12 (BNT) ferroelectric thin films were grown on (111)-oriented SrRuO3∕Pt electrodes on yttria-stabilized ZrO2 (YSZ)-buffered Si(100) substrates by pulsed laser deposition. X-ray diffraction characterization revealed the epitaxial orienta-tion relationships as follows: BNT(104)‖SrRu…
Electronic and Structural Properties of OxidesMultiferroics and related materialsFerroelectric and Piezoelectric Materials
Chunhui Du、Bao‐Ku Zhu、Jianyong Chen 等 4 位作者2006-02-06Polymer International
Abstract Silk fibroin/chitosan (SF/CS) blend membranes were prepared and characterized by infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and scanning electron microscopy. It was found that SF and CS were compatible in the blend membranes and that the membranes were dense without microscopic phase separ…
Electrospun Nanofibers in Biomedical ApplicationsPolymer Surface Interaction StudiesSilk-based biomaterials and applications