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VOLUME 70 (1999) | ISSUE 11 |
PAGE 759
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The widths of single particle states of anisotropic strongly correlated electron systems in solids
Khodel V.A., Zverev M.V.
PACS: 71.10.Hf, 71.24.+q
The damping 7(e) of electron states in crystals is investigated beyond the phase transition point related to a rearrangement of the Fermi surface. The attention is focused on the alteration of the standard Landau theory due to the emergence of a flat portion in spectrum ξ(ρ) of the single particle excitations triggered by the rearrangement. In the limit e -> 0, the width 7(e) of the states in the region of the Brillouin zone, where the dispersion of ξ(ρ) has an ordinary order of value is found to depend on ε almost linearly in contrast to the Fermi-liquid-theory result у (ε) ~ ε2.
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