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On the Phase Transition between the Commensurate and Incommensurate Charge‐Density Wave States of the Nearly Half‐Filled Fröhlich Model
Author(s) -
Fischbeck H. J.,
Mertsching J.
Publication year - 1980
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221000214
Subject(s) - condensed matter physics , phase diagram , charge density wave , phase transition , zero (linguistics) , phase (matter) , plane (geometry) , order (exchange) , charge (physics) , physics , field (mathematics) , first order , mean field theory , quantum mechanics , mathematics , geometry , superconductivity , economics , linguistics , philosophy , finance , pure mathematics
Abstract The commensurate—incommensurate phase transition of the nearly half‐filled one‐dimensional Fröhlich model is studied by numerical calculations of the grand potential in the mean‐field approximation. The phase diagram in the μ, T and the n , T plane is calculated using one and three order parameters of the incommensurate phase. The question whether or not the discontinuous phase transition becomes continuous at zero temperature with inclusion of an infinite number of order parameters remains open.