Two-dimensional electron-hole metallic liquids

  • Yoshio Kuramoto
  • Hiroshi Kamimura
Electron-hole Drops
Part of the Lecture Notes in Physics book series (LNP, volume 57)


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.


Effective Mass Ground State Energy Cohesive Energy Collective Mode Free Exciton 


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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • Yoshio Kuramoto
    • 1
  • Hiroshi Kamimura
    • 1
  1. 1.Department of PhysicsFaculty of Science, University of TokyoTokyoJapan

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