Showing papers in "Solid State Communications in 1999"

TL;DR: In this paper, Bernoulli-Euler beam bending theory is used to infer the Young's Modulus, and the validity of such an approach using a simple elastic sheet model and show that at the nanotube scale the assumptions of continuum mechanics must be carefully respected to obtain reasonable results.

TL;DR: In this article, the growth of the GaONW is not controlled by the well-known vapor liquid solid (VLS) mechanism, instead they are seemingly grown via a vapor-solid (VS) process, in which the structural defects play an important role both during the nucleation and the preferable axial growth of wires.

TL;DR: In this paper, the dielectric constant increases with decreasing temperature and saturates at low temperatures, and the authors classified CaTiO3 as an incipient ferroelectric or a quantum paraelectric.

TL;DR: In this article, it was shown that low-temperature, electronic transport in Landau levels N > 1 of a two-dimensional electron system is strongly anisotropic, and the transport anisotropies may be indicative of a new many particle state, which forms exclusively in higher landau levels.

TL;DR: In this paper, the authors present a quantitative two-band theory which describes analytically the composition dependence of the energy gap, interband momentum matrix element and band edge effective masses in GaNxAs1−x alloys for x > 0.1.

TL;DR: With YNi alloy and CaC2-Ni as catalyst, large-scale single-wall carbon nanotubes (SWCNTs) were produced by dc arc discharge method.

TL;DR: In this paper, the existence of a ferrimagnetic state at low temperatures has been shown to be disproved by electron spin-down t 2g electrons using magnetic and structural characterisation.

TL;DR: In this article, a new structural model for the graphitic form of the carbonitride, C 3 N 4, is proposed based on a new carbon vacancy order leading to an orthorhombic cell.

TL;DR: In this article, microscopic images of the local electron compressibility, electrostatic potential, and current-induced Hall voltage of a two-dimensional sheet of electrons in the quantum Hall regime are acquired using a single-electron transistor as a scanned probe.

TL;DR: In this article, the authors measured two-photon absorption coefficients for layered chalcogenide crystals TlGaSe2, TlInS2,TlGaS2 and GaSe.

TL;DR: In this paper, the effects of reaction temperature and organic additives on the particulate properties such as the particle morphology and size are discussed. And the result reveals that high temperature leads to a similar growth speed of different crystallographic planes and several templates result in the formation of particles with different morphologies and sizes.

TL;DR: In this paper, the combustion method has been used to prepare nanophased powders of cobalt spinel ferrite using glycine as fuel, and structural and magnetic properties of the products were investigated with an X-ray diffractometer, a surface analyzer, and an alternating gradient magnetometer, respectively.

TL;DR: In this paper, the broken translation symmetry due to structural defects may play a more important role than the quantum confinement effect in the Raman features of optical phonons in polar semiconductor quantum wires such as SiC nanorods.

TL;DR: In this article, a degenerate n-type semiconductor with the carrier concentration of ∼3×10 20 /cm 3 was investigated by the use of infrared and Raman spectra, and six optical phonons were observed.

TL;DR: In this paper, a model based on the Baldereschi-Lipari effective mass theory and the sp −d exchange interaction between the valence band and the Mn d electrons (3d5) was presented.

TL;DR: In this paper, the dielectric function of wurtzite GaN and AlN was analyzed using Spectroscopic ellipsometry and the predicted polarization dependence of these materials exhibits features similar to that in other wurtzeite structure materials.

TL;DR: In this article, the BaTiO3-BaZrO3−CaTiO-3 system has been studied by X-ray diffraction on unpoled and poled ceramics.

TL;DR: Raman scattering and temperature-modulated differential scanning calorimetry measurements on SixSe1−x glasses show that onset of rigidity occurs over a wide compositional window 0.20.

TL;DR: In this paper, the behaviors of 2 k F and 4 k F charge-density waves (CDWs) coexisting with spin density waves (SDWs) in the title compounds were studied by diffuse X-ray scattering down to 1.6

TL;DR: In this paper, the experimental data for La2/3Ca1/3MnO3 thin films are consistent with the description of a generation of thermoelectric fields caused by off-diagonal elements of the Seebeck tensor.

TL;DR: In this article, a detailed study of the low-temperature electrical resistivity and electron tunneling conductance of La0.7A0.3MnO3, (A: Ca, Sr, Ba) perovskite oxides is presented.

TL;DR: The equation of state of lithium has been measured up to 21 GPa using diamond anvil cell techniques and high-resolution angle-dispersive synchrotron X-ray diffraction.

TL;DR: In this paper, a new ternary filled skutterudite, YbFe4Sb12, was synthesized by reaction sintering and the crystal structure was determined from single crystal X-ray counter data: LaFe4P12-type, space group Im 3 −T h 5 No. 204, Z=2, a=0.91571(5)nm.

TL;DR: In this paper, the Schottky barrier height distributions of a PtSi film on n-Si(100) were measured by ballistic electron emission spectroscopy at temperatures ranging from 180 to 300 K.

TL;DR: In this paper, an ab initio calculation of the real part of the phonon self energy for longitudinal and transverse optical Raman phonons in GaAs, AlAs, GaP and InP is presented.

TL;DR: In this article, the authors measured the dependence of the absorption coefficient on photon energy and temperature near the fundamental absorption edge for layered single crystal, Gallium selenide (GaSe), and explained the exponentially increasing absorption tail as an Urbach-Martienssen's (U-M's) tails in the 10 −340 K temperature range.

TL;DR: In this article, an indirect gap semiconductor selenium dispersed in a polymer host is synthesized by the precipitation in a viscous polymer solution and by subsequent evaporation of the solvent.

TL;DR: In this paper, the influence of different multipole terms on the photoelectric scattering process stimulated by an X-ray interference field which is generated by two plane, coherent waves is discussed, and the contributions of dipole and quadrupole terms are analyzed starting with the model of a single atom within the standing wave field, which is then generalized for a distribution of atoms within the interference field.

TL;DR: In this paper, the electron energy-loss spectroscopic measurements of potassium intercalated bundles of single-wall carbon nanotubes were presented, and the loss function at low momentum transfer can be simulated within a simple Drude-Lorentz model.

TL;DR: In this paper, the polarization dependence of the Raman spectra of single-wall carbon nanotubes (SWCNs) dispersed in one-dimensional channels of an AlPO 4 -5 (AFI) single crystal was investigated.