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- W2002024666 abstract "A weakly interacting system of electrons (e) and ions (i) is considered. Based on analytical formulae in the limiting regions of both weak and strong degeneration of the e4-contribution and a few computer calculated points in the intermediate region n Λ3 ≈ 1 (n electron density, Λ thermal wavelength, Λ2 = 2πβh2/me, β = (kBT)−1, me electron mass) Padé-approximations for the thermodynamic functions are constructed which are valid in the entire temperature–density plane. The temperature dependence of the exchange and correlation contribution to the chemical potential is taken into account here for the first time. In the framework of an unsymmetrical electron–hole model of germanium, a phase transition occurs with a critical point at Tc = 8 K and nc = 1.0 × 1017 cm−3. Es wird ein schwach wechselwirkendes System aus Elektronen (e) und Ionen (i) betrachtet. Mit bekannten analytischen Formeln in den Grenzgebieten schwacher und starker Entartung für den e4-Beitrag und computerberechneten Punkten im Zwischenbereich (n ≈ 1) werden Padé-Approximationen für die thermodynamischen Funktionen konstruiert, die in der gesamten Temperatur-Dichte-Ebene gültig sind. Erstmals wird der Austausch- und Korrelationsbeitrag zum chemischen Potential temperaturabhängig berechnet. Im Rahmen eines unsymmetrischen Elektron-Loch-Modells des Germaniums wird ein Phasenübergang mit der kritischen Temperatur Tc = 8 K und der kritischen Dichte nc = 1,0 × 1017 cm−3 erhalten." @default.
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- W2002024666 date "1981-03-01" @default.
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- W2002024666 title "Padé Approximations for the Thermodynamic Functions of Weakly Interacting Coulombic Quantum Systems" @default.
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- W2002024666 doi "https://doi.org/10.1002/pssb.2221040120" @default.
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