Theory of Two-Dimensional Electron-Hole Liquids —Application to Layer-Type Semiconductors—

Yoshio Kuramoto, Hiroshi Kamimura

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

The ground state energy of two-dimensional electron-hole metallic liquid is calculated with use of the generalized random phase approximation of Hubbard. The following two cases are treated to investigate effects of dimensionality and many-valley structure: (i) the system with a single extremum in conduction and valence bands and (ii) the system with the many-valley structure in the conduction band. It is shown that the ground state energy of the two-dimensional system is four times larger than that of corresponding three-dimensional system in the case (i) while it becomes more than four times larger in the case (ii) where the effective mass of electrons is lighter than that of holes. A possibility of producing the electron-hole pancake in highly excited layer-type semiconductors is pointed out. The dispersion relations of two-dimensional plasmons and acoustic modes are also derived.

Original languageEnglish
Pages (from-to)716-723
Number of pages8
Journaljournal of the physical society of japan
Volume37
Issue number3
DOIs
Publication statusPublished - 1974 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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