TY - JOUR
T1 - A small U approach to the 4kF reflections in organic linear chain compounds
AU - Weger, M.
AU - Gutfreund, H.
PY - 1979/12
Y1 - 1979/12
N2 - It is shown that a lattice distortion of wavevector 4kF with an essentially one-dimensional correlation occurs in a one-dimensional metal when the intramolecular Coulomb interaction U is small compared with the band-width 4t; ( U 4t {reversed tilde equals} 1 4). This one-dimensional property suppresses the real phase-transition temperature well below the mean-field transition, where fluctuative 4kF distortions build up. This accounts for the 4kF reflections observed in TTF-TCNQ and several other charge transfer compounds. The strong locking of the electrons to the lattice when the band is 1 4 (or 1 2) full, and weak locking when the band is 1 3 (or 2 3) full, are also accounted for.
AB - It is shown that a lattice distortion of wavevector 4kF with an essentially one-dimensional correlation occurs in a one-dimensional metal when the intramolecular Coulomb interaction U is small compared with the band-width 4t; ( U 4t {reversed tilde equals} 1 4). This one-dimensional property suppresses the real phase-transition temperature well below the mean-field transition, where fluctuative 4kF distortions build up. This accounts for the 4kF reflections observed in TTF-TCNQ and several other charge transfer compounds. The strong locking of the electrons to the lattice when the band is 1 4 (or 1 2) full, and weak locking when the band is 1 3 (or 2 3) full, are also accounted for.
UR - http://www.scopus.com/inward/record.url?scp=0018679078&partnerID=8YFLogxK
U2 - 10.1016/0038-1098(79)90880-9
DO - 10.1016/0038-1098(79)90880-9
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AN - SCOPUS:0018679078
SN - 0038-1098
VL - 32
SP - 1259
EP - 1264
JO - Solid State Communications
JF - Solid State Communications
IS - 12
ER -