Theory of Two-Dimensional Electron-Hole Liquids : Application to Layer-Type Semiconductors
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概要
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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 is 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.
- 社団法人日本物理学会の論文
- 1974-09-15
著者
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Kuramoto Yoshio
Department Of Applied Physics Faculty Of Engineering Tohoku University
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Kuramoto Yoshio
Department Of Physics Faculty Of Science University Of Tokyo
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Kamimura Hiroshi
Department Of Applied Physics . Faculty Of Science Tokyo University Of Science
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