scispace - formally typeset
Search or ask a question

Showing papers in "Solid State Communications in 1975"


Journal ArticleDOI
TL;DR: In this article, the exchange-correlation energy of a metal surface is analyzed in terms of the wavelength of the fluctuations which contribute to it, and a scheme is proposed to interpolate between the shortwavelength region properly described by the local density functional approximation and the long-wavelength regions for which an exact limiting form is established.

749 citations


Journal ArticleDOI
J.D. Bierlein1, Arthur W. Sleight1
TL;DR: In this paper, a transition in BiVO4 crystals has been observed at 255°C. Optical and X-ray studies indicate that this is a ferroelastic transition of the type 4/m F2/m.

212 citations


Journal ArticleDOI
TL;DR: In this paper, steadystate photocurrents proportional to the light intensity have been observed parallel to the crystallographic c-axis and the open-circuit photovoltage exceeds the value of the band gap.

143 citations


Journal ArticleDOI
TL;DR: In this article, the shape of core lines obtained by X-ray photo-emission spectroscopy (XPS) was analyzed in terms of the theory of Nozieres and De Dominicis.

131 citations


Journal ArticleDOI
TL;DR: In this paper, NMR studies of lithium intercalation complexes of layered disulfides and diselenides of Group IVb and Vb transition metals establish that the inclusion of a guest lithium atom between the host dichalcogenide layers is accompanied by the donation of approximately one electron to the host.

123 citations


Journal ArticleDOI
TL;DR: Tunneling states and rotations in solid CH 4 II have been analyzed by incoherent neutron scattering in this article, showing that tunnel energies E TUN 1 = 143 ± 3 μ eV and ETUN 2 = 73 ± 3 µ eV have been observed at 4.9 K and interpreted as transitions from AT and T ǫ spin species, respectively.

120 citations


Journal ArticleDOI
TL;DR: In this article, a two-state configuration coordinate diagram is used to explain the occurence or non-occurence of F-center luminescence in ionic crystals.

109 citations


Journal ArticleDOI
TL;DR: In this article, the ferroelectric phase transition of BiFeO3 solid solution was studied by the method of differential thermal analysis, showing that the endothermal effect observed at about 820°C is related to the phase transition.

108 citations


Journal ArticleDOI
M.J. Rice1, C. B. Duke1, Nunzio O. Lipari1
TL;DR: In this paper, a tight-binding molecular orbital model of a conducting chain of large planar organic molecules was used to show that the charge density wave state in the organic metal TTF-TCNQ is stabilized predominantly by a set of small amplitude intra molecular distortions while the condensate effective mass characterizing its dynamical properties is dominated by large amplitude inter molecular distortions.

93 citations


Journal ArticleDOI
Inder P. Batra1, P.S. Bagus1
TL;DR: In this paper, a new interpretation is proposed for the observed photoemission spectra of CO on Ni, which is consistent with the large bonding and relaxation shifts in other systems.

91 citations


Journal ArticleDOI
TL;DR: In this article, the temperature dependent soft phonon was observed transformation and a premartensitic metastable phase was also found, in which new satellite reflections at (H± 2 3, K ∓ 2 3, 0) have been observed around fundamental reflections with H + K = 4n.

Journal ArticleDOI
TL;DR: In this paper, a new method is described for the evaluation of impact ionization coefficients, α, in insulators by the measurement of current transients which grow due to impact ionisation.

Journal ArticleDOI
TL;DR: In this paper, a defect state associated with the E center (phosphorus-vacancy pair) was found to disappear at approximately 150°C with an activation energy of 0.95 ± 0.03 eV in the neutral charge state and 1.25 − 0.05 − 1.

Journal ArticleDOI
TL;DR: In this paper, the free oxygen positional parameter has been determined to be 0.2981(4) and the coordination of Fe by its six oxygen neighbours is nearly cubic. But this was obtained from 164 independent X-ray reflections to R = 0.031, including anisotropic thermal parameters for Fe and B.

Journal ArticleDOI
TL;DR: In this paper, the quantum theory of Kawbata and Kubo was used to calculate the position of the Mie optical absorption peak for small silver particles, which is close to that obtained with a classical model and does not explain the shift to long wavelength experimentally observed.

Journal ArticleDOI
A. Levstik1, Robert Blinc1, P. Kadaba1, S. Čižikov1, I. Levstik1, C. Filipič1 
TL;DR: In this article, the authors show that orthorhombic CsH 2 PO 4 undergoes a ferroelectric transition at T c = −119.5° C, whereas the ferroelectric transition temperature in isomorphous CsD 2 PO4 is Tc = −5.55° C.

Journal ArticleDOI
TL;DR: In this article, it was shown that agreement of calculated LEED spectra with experiment is subject to multiple coincidences in the vertical adsorbate-substrate spacing, with a periodicity of about 0.7 A.

Journal ArticleDOI
TL;DR: The magnetic moments in the fully occupied layers have been determined, which are ferromagnetic aligned and point along the c-axis with an average moment value of 2.65μB as discussed by the authors.

Journal ArticleDOI
TL;DR: In contrast to the one-mode behavior that is anticipated on the basis of the mass ratio of the alloy atoms (Ge/As), two bond-stretching modes are observed in both the i.r. and Raman spectra of the amorphous pseudo-binary alloy systems as discussed by the authors.

Journal ArticleDOI
TL;DR: In this paper, the penetration depth of the applied voltage in the metal, for not too large modifications of the surface charge (up to 2.5 × 1014 electrons/cm2), is 1-1.5 times the Thomas-Fermi screening length.

Journal ArticleDOI
TL;DR: In this paper, rare earth iron silicides and germanides of the R Fe 2 Si 2 type with R = La, Ce, Pr, Nd, Sm, Gd and Dy were measured for their magnetic susceptibility.

Journal ArticleDOI
TL;DR: In this article, it was shown that after high oxygen exposures, the epitaxial growth of NiO can be identified from the LEED pattern and the corresponding photoelectron spectrum is strongly altered and exhibits close agreement with the transition energies as calculated by Messmer et al. for a NiO 6 10- -cluster.

Journal ArticleDOI
TL;DR: From optical and thermal bleaching experiments, it is concluded that the 400 nm absorption band which appears in Al2O3 after γ-irradiation is a composite V band as mentioned in this paper.


Journal ArticleDOI
TL;DR: In this paper, a diamond anvil optical cell is employed to measure the pressure dependence of the fundamental indirect Γ-X transition of crystalline Si, and the result is E (eV) = (1.110 ± 0.002) − ( 1.41 − 0.06) × 10 − 3 P where the pressure P is in kbar.

Journal ArticleDOI
TL;DR: In this paper, the relationship of the unusual stoichiometry of (TTF)Br 0.71−0.76 to the degree of charge transfer in 1 : 1 Π-donor/ TCNQ salts is examined and discussed.

Journal ArticleDOI
TL;DR: In this article, the measured one-phonon Raman spectra which show a gap between the acoustic and optic modes are discussed, and the resonance energy at 2.8 eV corresponds to the low-energy edge of interband transitions.

Journal ArticleDOI
TL;DR: In this paper, molecular dynamics computer simulations have been carried out for a structurally unstable 1-D lattice, having a double well local potential and nearest neighbor coupling, and the results show pronounced domain structure at low temperature.

Journal ArticleDOI
TL;DR: In this paper, the eigenfunction for the center of mass motion of a Mott-Wannier exciton in a bounded medium was determined by solving asymptotically an effective mass equation, assuming electron and hole reflect perfectly from the surface: the surface potential is taken as an infinite barrier.

Journal ArticleDOI
TL;DR: In this article, a neutron diffraction study of magnetite below the Verwey transition (123 K) reveals that the superlattice reflections are observed for (hhl), with l = integers + 1 2 but not for hl, which implies that only one of the doubly degenerate modes, proposed by Yamada, condenses at the transition.