Physics – Condensed Matter
Scientific paper
1994-07-04
Physics
Condensed Matter
14 pages, LaTeX, G{\"o}teborg preprint APR 94-35
Scientific paper
10.1103/PhysRevB.52.10865
The influence of long-range Coulomb interactions on the properties of one-dimensional (1D) strongly correlated electron systems in vicinity of the metal-insulator phase transition is considered. It is shown that unscreened repulsive Coulomb forces lead to the formation of a 1D Wigner crystal in the metallic phase and to the transformation of the square-root singularity of the compressibility (characterizing the commensurate-incommensurate transition) to a logarithmic singularity. The properties of the insulating (Mott) phase depend on the character of the short-wavelength screening of the Coulomb forces. For a sufficiently short screening length the characteristics of the charge excitations in the insulating phase are totally determined by the Coulomb interaction and these quasipartic les can be described as quasiclassical Coulomb solitons.
Jonson Mats
Krive Ilya V.
Nersesyan Alexander A.
Shekhter Robert I.
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