Quasi-Particle Spectral Weight in the Two-Dimensional Electron Gas

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概要

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• The quasi-particle spectral weight at the Fermi level (Z_F) in the two-dimensional (2D) electron gas is determined as a function of density. A model local field correction factor (G(q)) possessing the correct features both in the small and large q limits is introduced and used to calculate the Z_F, by evaluating the electron self-energy within the GW approximation. It is found that the Z_F calculated using the present G(q) is smaller than the one calculated using the Hubbard G(q) implying that the correlation interaction makes the system more localized. Our result also indicates that high T_c superconductors, if described by a 2D electron gas system, will exhibit a small but nonzero (〜0.2) quasi-particle spectral weight at the Fermi level.

• 社団法人日本物理学会の論文
• 1993-10-15

著者

• Min B

  Pohang Univ. Sci. And Technol. Pohang Kor

• Jang Y.-R.

  Department of Physics, Pohang University of Science and Technology

• Min B.I.

  Department of Physics, Pohang University of Science and Technology

• Jang Y.-r.

  Department Of Physics Pohang University Of Science And Technology

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