Coexisting phases in an electron—hole plasma

Ébeling, W.; Kraeft, W. D.; Kremp, D.; Kilimann, K.

doi:10.1002/pssb.2220780123

Cited by 24 publications

(10 citation statements)

References 21 publications

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“…At lower temperatures, a van der Waals loop occurs, i.e., a region with an instability ‫ץ‬ / ‫ץ‬n Յ 0, which may be a signal of a phase transition. 1,2, 43 The lower panel shows a comparison of several approximations for : self-consistent iterative solution of Eqs. ͑34͒ and ͑10͒ ͑later on referred to as iter ͒, RZR , Hartree-Fock and Debye approximations, and ideal chemical potential.…”

Section: Chemical Potential and Degree Of Ionizationmentioning

confidence: 99%

Ionization equilibrium in an excited semiconductor: Mott transition versus Bose-Einstein condensation

et al. 2009

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The ionization equilibrium of an electron-hole plasma in a highly excited semiconductor is investigated. Special attention is directed to the influence of many-particle effects such as screening and lowering of the ionization energy causing, in particular, the Mott effect ͑density ionization͒. This effect limits the region of existence of excitons and, therefore, of a possible Bose-Einstein condensate at low temperatures. Results for the chemical potential and the degree of ionization are presented for zinc selenide ͑ZnSe͒. A possible window for the occurrence of a Bose-Einstein condensate of excitons is shown, taking into account the Mott effect.

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Section: Chemical Potential and Degree Of Ionizationmentioning

confidence: 99%

Ionization equilibrium in an excited semiconductor: Mott transition versus Bose-Einstein condensation

et al. 2009

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“…This equation describes a nonideal plasma with an effective ionization energy given by the ground state energy and the Debye shift [21]. The corrections due t o nonideality can lead to an interesting behaviour of the stationary states.…”

Section: Resultsmentioning

confidence: 99%

Kinetic Theory of Chemically Reacting Systems

Kremp¹,

Schlanges²,

Bornath³

1988

Physica Status Solidi (b)

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A kinetic approach for chemically reacting systems is derived on the basis of a nonequilibrium Green's function method. This approach is used to take into account nonideality effects in the rate equation for the exciton density in a semiconductor. Numerical results, especially for the impact ionization coefficient, are given in the case of germanium.Fiir chemisch reagierende Systeme wird ein kinetischer Zugang auf der Basis von Nichtgleichgewichts-Greenfunktionen entwickelt. Dieser Zugang wird benutzt, urn Nichtidealitgtseffekte in der Ratengleichung fur die Exzitonendichte in einem Halbleiter zu beschreiben. Numerische Ergebnisse, insbesondere fur den Impact-Ionisationskoeffizienten, werden fur Germanium angegeben.

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“…Similar as for the van der Waals isotherms, the wiggles of the F-isotherms indicate a thermodynamic instability of the system. As can be shown easily, the compressibility condition of stability can be written as follows [14] _ _ -aP n2 a x . T) >o.…”

Section: Id"mentioning

confidence: 99%

Pressure Ionization in Nonideal Alkali Plasmas

et al. 1979

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Abstract. A system of electrons (e) and ions (i) is considered in which beside the Coulomb interaction short range forces are taken into account, i.e. for the e-i interaction a pseudopotential is used, and for the (classical) ions crystallographic radii are used.For a Cesium plasma the thermcdynamic properties are calculated quantumstatistically in a wide temperature-density region. Degeneration effects are taken into account approsimately. In the region with bound states the ionization equilibrium L discussed, and the Mott-Transition ia investigated critically. A phase transition occurs in the framework of the model chosen at Tc w 4500 K and nc M 4.10m cm-3. Druckionisation von nichtidealen AlkaliplasmenZusammenfassung. Bei der Wechselwirkung eines System aus Elektronen und Ionen werden auDer den Coulombkraften auch kursreichende Krifte beriicksichtigt, d. h. die Elektronen-IonenWechseldrkung wird durch ein Pseudopotential beachrieben und die (klassischen) Ionen werden als harte Kugeln mit kristallographischen Radien betrachtet.Fiir ein Ciiumplasma werden in einem ausgedehnten Temperatur-Dichte-Bereich thermodynamische Eigenschaften mit Hilfe der Quantenstatistik berechnet, wobei Entartungseffekte niiherungsweise beriicksichtigt werden.In einem Gebiet, in dem Bindungszustiinde wesentlich sind, wird das Ionisationsgleichgewicht diskutiert. Der Mott-obergang wird kritisch behandelt.Im Rahmen des in der Arbeit gewghlten Modells beobachten wir einen Phasenubergang bei einer kritischen Temperatur von T, w 4500 K und einer kritischen Elektronendichte nc w 4 . loao cm-S.

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Coexisting phases in an electron—hole plasma

Cited by 24 publications

References 21 publications

Ionization equilibrium in an excited semiconductor: Mott transition versus Bose-Einstein condensation

Ionization equilibrium in an excited semiconductor: Mott transition versus Bose-Einstein condensation

Kinetic Theory of Chemically Reacting Systems

Pressure Ionization in Nonideal Alkali Plasmas

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