Abstract
The ground state energy of two-dimensional electron-hole liquids is calculated in the generalized random phase approximation. It is shown that the cohesive energy per electron-hole pair exceeds the binding energy of a two-dimensional exciton in the case of a system with two conduction band minima and a single valence band maximum with a heavier effective mass. A possibility of producing electron-hole “pancakes” in layer-type semiconductors is pointed out. The many-body correction of the effective masses and dispersion relations of collective modes are also derived. Finally the condition for occurrence of excitonic phases is discussed.
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© 1976 Springer-Verlag
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Kuramoto, Y., Kamimura, H. (1976). Two-dimensional electron-hole metallic liquids. In: Physics of Highly Excited States in Solids. Lecture Notes in Physics, vol 57. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-07991-2_94
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DOI: https://doi.org/10.1007/3-540-07991-2_94
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Online ISBN: 978-3-540-37975-1
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