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  • 1
    Electronic Resource
    Electronic Resource
    Variations of the infrared transmission properties with the metal–insulator transition in thin films of the yttrium-hydride system (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 6135-6138 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This work investigates the variations of the infrared transmission spectra of yttrium-hydride films YHx during the hydrogen loading process for the frequency range 500–4000 cm−1. The results indicate that the transmittance slightly decreases in the dihydride phase, followed by a significant increase in the trihydride phase. In addition, the carrier concentration decreases, whereas the carrier relaxation time increases with hydrogen content. The hydrogen vibration modes at interstitial sites are completely screened in the dihydride phase. The screening effect decreases as the system goes through the metal–insulator transition. Moreover, the screening effect can be continuously tuned by simply varying the hydrogen content in the yttrium-hydride system. Analysis indicates that the absorption intensity of the vibration mode depends on the carrier concentration. This effect can be used as a diagnostic tool for estimating the carrier concentration and hydrogen content in rare-earth hydrides. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1367879
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of the optical constants of the γ-phase GdH3 thin films (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 7798-7801 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have measured the optical transmittance of thin films of gadolinium trihydride GdH3 over a broad spectral range, 0.05–6 eV. The analysis indicates that GdH3 is a wide-gap semiconductor with an energy gap of 2.55 eV. The fundamental absorption and impurity-related transitions dominate the spectra in the high-energy region, 1–6 eV. Hydrogen vibration modes dominate the spectra in the low-energy region, 0.05–0.2 eV. A strong free-carrier absorption effect is observed. In addition, the frequency-dependent refractive index, extinction coefficient, dielectric function, and optical conductivity are determined from the transmission spectra. This work also evaluates the plasma frequency associated with free carriers. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.373457
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  • 3
    Electronic Resource
    Electronic Resource
    Optical properties of the γ-phase yttrium trihydride YH3−δ (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 6798-6802 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The transmission spectra of thin films of γ-phase yttrium trihydride YHx, x≅2.87, are measured in the energy range 0.05–6 eV at room temperature. The measured quantities are used to determine the frequency-dependent index of refraction, extinction coefficient, dielectric function, and optical conductivity. In the energy range (E=0.2–6 eV), interband transition and impurity-related transitions dominate the optical properties. In the low-energy range (E=0.05–0.2 eV), hydrogen vibration modes dominate the optical properties. In addition, strong absorption due to free carriers is observed. This work also evaluates several parameters such as plasma frequency, effective carrier density, and donor ionization energy. The possible sources for optical features observed in the spectra are also described. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371754
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  • 4
    Electronic Resource
    Electronic Resource
    An Existence Proof for Equilibrium in a Capital Asset Market (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of business finance & accounting 2 (1975), S. 0 
    Details
    ISSN: 1468-5957
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: The finance literature abounds with theoretical and empirical developments of the original Sharpe/Lintner models of equilibrium in capital asset markets. Almost all of these contributions are premised upon the existence of equilibrium in such models and yet there is apparently no formal existence proof in the literature. The purpose of this paper is to establish such a proof.La littérature de la finance abonde de développements théoriques et empiriques des premiers modèles de Sharpe/Lintner concernant l'équilibre dans les marchés des valeurs. Dans de tels modèles, la plupart de ces interventions sont basées sur l'existence d'un équilibre et pourtant il n'existe apparemment pas de preuve formelle de l'existence d'un tel équilibre dans la littérature. Le but de ce papier est donc d'en établir une telle preuve.Das Schrifttum der Finanzwirtschaftslehre wimmelt von theoretischen und empirischen Entwicklungen der ursprünglichen Sharpe/Lintner-Gleichgewichtsmodelle in ‘Capital Asset’ MÄrkten. Fast alle dieser Beiträge schicken das Bestehen eines Gleichgewichtes in solchen Modellen voraus obwohl anscheinend kein formeller Bestehensbeweis dafur in der Literatur zu finden ist. Der Zweck dieses Beitrages ist die Feststellung eines solchen Beweises.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1468-5957.1975.tb00945.x
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  • 5
    Electronic Resource
    Electronic Resource
    Catalytic Desulfurization of Gasolines by Cobalt Molybdate Process (1943)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 35 (1943), S. 1160-1167 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50407a007
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  • 6
    Electronic Resource
    Electronic Resource
    Optical characterization of wurtzite gallium nitride nanowires (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 3693-3695 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The optical properties of the gallium nitride (GaN) nanowires are examined by the transmission method in the ultraviolet-visible range (1–5 eV) and by the reflection method in the infrared range (500–4000 cm−1). The absorption edge of the GaN nanowires is blueshifted by 0.2 eV from the bulk edge. The temperature dependence of the energy gap is expressed by, Eg(T)=3.724−9.97×10−4/(861+T) eV. The plasma frequency and the free-carrier density of the GaN nanowires, deduced from the infrared reflectance minima, are estimated to be ωp=1100±120 cm−1 and nf=3.73×1017 cm−3, respectively. Obtaining the free-carrier density from the infrared reflectance spectra is especially useful in research on nanostructured semiconductors. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1416476
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  • 7
    Electronic Resource
    Electronic Resource
    Equilibrium Isotope Effects (1973)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physical Chemistry 24 (1973), S. 407-440 
    Details
    ISSN: 0066-426X
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.pc.24.100173.002203
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  • 8
    Electronic Resource
    Electronic Resource
    SHORT-RUN COST IN A DYNAMIC CONTEXT (1974)
    Oxford, UK : Blackwell Publishing Ltd
    Bulletin of economic research 26 (1974), S. 0 
    Details
    ISSN: 1467-8586
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-8586.1974.tb00102.x
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  • 9
    Electronic Resource
    Electronic Resource
    Dimeric ellagitannins from Alnus japonica
    Amsterdam : Elsevier
    Phytochemistry 31 (1992), S. 2835-2839 
    Details
    ISSN: 0031-9422
    Keywords: Alnus japonica ; Betulaceae ; alnusjaponins A and B ; ellagitannin ; hydrolysable tannin ; intramolecular C-glycosidation.
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9422(92)83642-C
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  • 10
    Electronic Resource
    Electronic Resource
    Optical evidence for the impurity band nature of the metal-insulator transition in GaAs
    Amsterdam : Elsevier
    Solid State Communications 66 (1988), S. 23-27 
    Details
    ISSN: 0038-1098
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0038-1098(88)90484-X
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