1,721,042 research outputs found
Ab initio pseudopotential calculation of the equilibrium structure of tin monoxide
No full textWe present an ab initio pseudopotential calculation of the structural properties of stannous oxide SnO. We discuss the delicate balance of different contributions to the cohesion of this material, and compare the monoxide to the dioxide SnO2. We point out how different choices concerning the pseudopotential of tin may dramatically influence the resulting equilibrium structure of SnO, and show that the physically most appropriate choice leads to excellent agreement with experiment
Electronic and Optical properties of nitrides
No full textElectronic and Optical properties of nitride
Electronic and optical properties of c-BN and BN(110)
No full textElectronic and optical properties of c-BN and BN(110
Analytical expression for the local-field factor G(q) and the exchange-correlation kernel Kxc(r) of the homogeneous electron gas
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Introduzione. La politica industriale in Italia
No full textIl saggio fa il punto sulla politica industriale in Itali
Electronic and Optical Properties of SiGe alloys within first-principles schemes
No full textElectronic and Optical Properties of SiGe alloys within first-principles scheme
Ab-Initio Calculation of the optical Properties of BN(110) Surface
No full textWe study the optical properties of the nonpolar (110) surface of cubic Boron Nitride calculated within the first-pinciple DFT-LDA scheme. The reflectance anisotropy (RA) spectrum is analyzed in relation to the better known spectrum of the GaAs(110) surface. The influence of the ionicity on the surface relaxation, the surface states character and the surface optical spectra, is studied. Comparisons with existing data for the surface under study and results to the GaN(110) surface are also given
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