Commensurate Peierls transition in a quasi-one-dimensional compound: The bromide salt of tetrathiafulvalene (TTF)

P. M. Chaikin; R. A. Craven; S. Etemad; S. J. La Placa; B. A. Scott; Y. Tomkiewicz; J. B. Torrance; B. Welber

doi:10.1103/PhysRevB.22.5599

Commensurate Peierls transition in a quasi-one-dimensional compound: The bromide salt of tetrathiafulvalene (TTF)

P. M. Chaikin, R. A. Craven, S. Etemad, S. J. La Placa, B. A. Scott, Y. Tomkiewicz, J. B. Torrance, B. Welber

Research output: Contribution to journal › Article

Abstract

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.

Original language	English (US)
Pages (from-to)	5599-5605
Number of pages	7
Journal	Physical Review B
Volume	22
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevB.22.5599
State	Published - 1980

ASJC Scopus subject areas

Condensed Matter Physics

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Chaikin, P. M., Craven, R. A., Etemad, S., La Placa, S. J., Scott, B. A., Tomkiewicz, Y., Torrance, J. B., & Welber, B. (1980). Commensurate Peierls transition in a quasi-one-dimensional compound: The bromide salt of tetrathiafulvalene (TTF). Physical Review B, 22(12), 5599-5605. https://doi.org/10.1103/PhysRevB.22.5599

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title = "Commensurate Peierls transition in a quasi-one-dimensional compound: The bromide salt of tetrathiafulvalene (TTF)",

abstract = "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.",

author = "Chaikin, {P. M.} and Craven, {R. A.} and S. Etemad and {La Placa}, {S. J.} and Scott, {B. A.} and Y. Tomkiewicz and Torrance, {J. B.} and B. Welber",

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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

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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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