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Showing papers in "Solid State Communications in 1989"


Journal ArticleDOI
TL;DR: In the high-Tc oxide superconductors, the coherence length along the c axis is very short and the layer structure itself works as strong pinning centers of the vortices.

471 citations


Journal ArticleDOI
TL;DR: In this paper, a metal-insulator-semiconductor field effect transistors (MISFET) with vacuum evaporated α-conjugated sexithienyl (α-6T) was fabricated and characterized.

467 citations


Journal ArticleDOI
TL;DR: In this paper, the authors measured reflection, luminescence and absorption spectra in an exciton region of (C 10 H 21 NH 3 ) 2 PbI 4, which is determined to be of layered perovskite type by X-ray diffraction.

355 citations


Journal ArticleDOI
TL;DR: In this paper, the authors employed the layer structures of the superconducting copper oxides as intrinsic flux pinning centers to calculate the critical current density as a function of the direction of an external magnetic field.

277 citations


Journal ArticleDOI
TL;DR: In this paper, the first theory of lattice heat conduction, formulated by Einstein in 1911, fits the thermal conductivity of amorphous dielectrics above 50 K with no free parameters.

275 citations


Journal ArticleDOI
TL;DR: In this article, single-crystal X-ray diffraction experiments on α-quartz at pressures to 15 GPa reveal structural instabilities that result in its gradual transition to an amorphous state.

216 citations


Journal ArticleDOI
TL;DR: The magnetization measurement of an exchange-enhanced Pauli paramagnet YCo2 has been made at 10 K in pulsed ultra-high magnetic fields up to 94 T to examine the existence of itinerant electron metamagnetism as discussed by the authors.

181 citations


Journal ArticleDOI
TL;DR: In this paper, the three Raman active modes predicted by group theory have been identified and their room temperature frequencies determined to be 298, 345 and 632 cm −1, and a new mode appears in the spectra (240 cm − 1 at 15K) as the sample is cooled below the Neel Temperature (TN = 225± 5k of Cupric Oxide).

174 citations


Journal ArticleDOI
TL;DR: In this paper, the contribution of longitudinal acoustic phonons to the electron-phonon coupling constant λ was estimated to lie within the weak coupling range, taking into account scattering of phonons by structural defects like boundaries, point defects, and sheetlike faults.

155 citations


Journal ArticleDOI
TL;DR: In this paper, it was shown that the coefficient A of the T 2 term in the resistivity and the linear specific heat coefficient γ appear to have the relation A / γ 2 = constant in heavy-fermion compounds.

151 citations


Journal ArticleDOI
TL;DR: In this article, the superconductivity of layered copper oxide compounds involving electrons in the CuO2 planes was investigated and it was shown that the supercondivity appears to be associated with electrons donated by tetravalent Th which substitutes for trivalent Nd.

Journal ArticleDOI
TL;DR: In this article, a sequence of 3D-XPS spectra is obtained for a ceria converted progressively (and partially) to Ce2O3 under increasing temperatures of reduction (up to 900°C).

Journal ArticleDOI
TL;DR: A new type oscillatory magnetotransport phenomenon has been observed in θ-type crystals of (BEDT-TTF) 2 I 3 at temperatures below 6 K and in the magnetic field above 3 T.

Journal ArticleDOI
TL;DR: In this article, drastic anomalies have been found below ∼ 60K in a narrow Ba concentration region around x=0.12, where the superconducting transition temperature is reported by Moodenbaugh et al. to have a significant dip as a function of x.

Journal ArticleDOI
TL;DR: In this article, the authors presented ultra-violet visible optical absorption spectra of thin solid films of four poly(3-alkylthiophenes) between 10 K and room temperature.

Journal ArticleDOI
TL;DR: The CH3NH3,5Bi2Br11 has been found to undergo a ferroparaelectric phase transition of the second-order type at 312.1 K and spontaneous polarization 7 × 10−3 Cm−2 at 285 K as discussed by the authors.

Journal ArticleDOI
G. Linker, Xiaoxing Xi, O. Meyer, Qi Li, J. Geerk 
TL;DR: The growth of YBaCuO thin films deposited by hollow magnetron sputtering on (100 and (110) SrTiO3 substrates has been studied as a function of deposition temperature, Ts.

Journal ArticleDOI
Peter M. Fischer1, J. Karpinski, E. Kaldis, E. Jilek, S. Rusiecki 
TL;DR: The high-T c superconductor YBa 2 Cu 4 O 8±x (T c ≅80 K) was synthesized for the first time as a bulk material using high pressure of oxygen and characterized by high accuracy chemical analysis, (± 0.001), T c measurements as well as x-ray diffraction.

Journal ArticleDOI
TL;DR: In this paper, the donor-like exciton with the hole location within a small region near the center of microcrystal is found, due to the potential of electron localized by the boundaries of micro-crystal.

Journal ArticleDOI
TL;DR: In this article, the superconducting properties of the multiphase compounds of (Bi 1.9− x Pb x Sb 0.1) Sr 2 Ca 2 Cu 3 O y have been investigated.

Journal ArticleDOI
TL;DR: In this paper, a study by X-ray diffraction and electron microscopy is reported of the type of compounds that are usually designated as ternary sulphides "MTS 3 " (M = Sn, Pb, Bi, rare earth metals; T = Nb, Ta).

Journal ArticleDOI
TL;DR: In this article, the structural and superconducting properties of YBa 2 Cu 3 O 7 /PrBa 2Cu 3 O7 heterostructures on SrTiO 3 were studied.

Journal ArticleDOI
TL;DR: In this paper, photo-luminescence of poly(3-alkylthiophene) film is found to increase with increasing temperature and after indicating maximum at a melting point it again decreases in the liquid phase.

Journal ArticleDOI
TL;DR: In this paper, a general structural model for multi-component, covalent amorphous and glassy systems is proposed, which demonstrates the importance of a generalized 8 - n rule and of the average number of valence electrons in amomorphous systems.

Journal ArticleDOI
TL;DR: In this article, the dependencies of excitons, trions and biexcitons energy spectra and their oscillator strength on microcrystal radius have been investigated taking into account the degeneracy of the valence band.

Journal ArticleDOI
A. L. Efros1
TL;DR: In this paper, the critical electron density n c of the metal-non-metal transition (MNMT) is found as a function of the spacer width and the ion density.

Journal ArticleDOI
TL;DR: In this article, a plasmon-pole approximation for dielectric function was used to find the magnetic oscillation of the self-energy of a photo-excited hole in the lowest Landau level.

Journal ArticleDOI
TL;DR: In this article, the cationic substitution of Cu by Co within the 85k Bi-based high Tc oxides to produce new phases of general formula Bi 2 M 3 Co 2 O y with M = Ca, Sr and Ba.

Journal ArticleDOI
TL;DR: In this paper, self-consistent ab initio pseudopotential calculations for Ge1−xSnx alloys in the Virtual Crystal Approximation (VCA) and for zincblende (zb-) GeSn clearly show their instability against phase segregation at zero temperature.

Journal ArticleDOI
TL;DR: In this paper, the graphite-Li intercalation compounds C2Li and C3Li of high lithium concentration have been prepared using the method of high pressure, and the superconducting transition was found to occur at 1.9 K.