TY - JOUR
T1 - Commensurate Peierls transition in a quasi-one-dimensional compound
T2 - The bromide salt of tetrathiafulvalene (TTF)
AU - Chaikin, P. M.
AU - Craven, R. A.
AU - Etemad, S.
AU - La Placa, S. J.
AU - Scott, B. A.
AU - Tomkiewicz, Y.
AU - Torrance, J. B.
AU - Welber, B.
PY - 1980
Y1 - 1980
N2 - The x-ray crystal structure of the bromide salt of tetrathiafulvalene (TTF)-Br0.79 shows incommensurate cation and anion sublattices, with a static modulation of each stack at the periodicity of the opposing stack. If the on-site Coulomb interactions were very small compared with the bandwidth, this modulation would induce an energy gap at twice the Fermi wave vector and hence a commensurate Peierls transition would be possible. If the Coulomb interactions were very large, (TTF)-Brx would be a room-temperature semiconductor. Transport, magnetic, thermal, and optical measurements are presented, which indicate that the Coulomb interactions are not very large compared with the bandwidth, estimated at 4t∼1.1 eV. Hence, the system can be viewed as undergoing a commensurate Peierls transition at ∼ 170 K.
AB - The x-ray crystal structure of the bromide salt of tetrathiafulvalene (TTF)-Br0.79 shows incommensurate cation and anion sublattices, with a static modulation of each stack at the periodicity of the opposing stack. If the on-site Coulomb interactions were very small compared with the bandwidth, this modulation would induce an energy gap at twice the Fermi wave vector and hence a commensurate Peierls transition would be possible. If the Coulomb interactions were very large, (TTF)-Brx would be a room-temperature semiconductor. Transport, magnetic, thermal, and optical measurements are presented, which indicate that the Coulomb interactions are not very large compared with the bandwidth, estimated at 4t∼1.1 eV. Hence, the system can be viewed as undergoing a commensurate Peierls transition at ∼ 170 K.
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U2 - 10.1103/PhysRevB.22.5599
DO - 10.1103/PhysRevB.22.5599
M3 - Article
AN - SCOPUS:25944434412
VL - 22
SP - 5599
EP - 5605
JO - Physical Review B
JF - Physical Review B
SN - 0163-1829
IS - 12
ER -