Temperature and pressure dependence of the resistivity of β-(BEDT-TTF)2X (X = I3, I2Au) and αt-(BEDT-TTF)2I3

M. Weger; K. Bender; T. Klutz; D. Schweitzer; F. Gross; C. P. Heidmann; Ch Probst; K. Andres

doi:10.1016/0379-6779(88)90322-0

Temperature and pressure dependence of the resistivity of β-(BEDT-TTF)₂X (X = I₃, I₂Au) and α_t-(BEDT-TTF)₂I₃

M. Weger^*, K. Bender, T. Klutz, D. Schweitzer, F. Gross, C. P. Heidmann, Ch Probst, K. Andres

^*Corresponding author for this work

Racah Institute of Physics

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Abstract

The temperature dependence of the resistivity of the organic metals and superconductors β-(BEDT-TTF)₂I₃, β-(BEDT-TTF)₂I₂Au and α_t(BEDT-TTF)₂I₃ was measured at ambient and at several isotropic pressures (up to 2.5 kbar). By the application of a relatively low pressure, it is possible to measure the term in the resistivity that is linear in temperature. This term is masked by the larger T² term at ambient pressure. It is shown that in the temperature range below 120 K, the external modes are mainly responsible for the resistivity, while above this temperature the flipping of the CH₂ groups becomes important. The linear electron-phonon coupling corresponds to a value of λ between 1 and 1.5.

Original language	English
Pages (from-to)	49-58
Number of pages	10
Journal	Synthetic Metals
Volume	25
Issue number	1
DOIs	https://doi.org/10.1016/0379-6779(88)90322-0
State	Published - Jul 1988

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title = "Temperature and pressure dependence of the resistivity of β-(BEDT-TTF)2X (X = I3, I2Au) and αt-(BEDT-TTF)2I3",

abstract = "The temperature dependence of the resistivity of the organic metals and superconductors β-(BEDT-TTF)2I3, β-(BEDT-TTF)2I2Au and αt(BEDT-TTF)2I3 was measured at ambient and at several isotropic pressures (up to 2.5 kbar). By the application of a relatively low pressure, it is possible to measure the term in the resistivity that is linear in temperature. This term is masked by the larger T2 term at ambient pressure. It is shown that in the temperature range below 120 K, the external modes are mainly responsible for the resistivity, while above this temperature the flipping of the CH2 groups becomes important. The linear electron-phonon coupling corresponds to a value of λ between 1 and 1.5.",

author = "M. Weger and K. Bender and T. Klutz and D. Schweitzer and F. Gross and Heidmann, {C. P.} and Ch Probst and K. Andres",

year = "1988",

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T1 - Temperature and pressure dependence of the resistivity of β-(BEDT-TTF)2X (X = I3, I2Au) and αt-(BEDT-TTF)2I3

AU - Weger, M.

AU - Bender, K.

AU - Klutz, T.

AU - Schweitzer, D.

AU - Gross, F.

AU - Heidmann, C. P.

AU - Probst, Ch

AU - Andres, K.

PY - 1988/7

Y1 - 1988/7

N2 - The temperature dependence of the resistivity of the organic metals and superconductors β-(BEDT-TTF)2I3, β-(BEDT-TTF)2I2Au and αt(BEDT-TTF)2I3 was measured at ambient and at several isotropic pressures (up to 2.5 kbar). By the application of a relatively low pressure, it is possible to measure the term in the resistivity that is linear in temperature. This term is masked by the larger T2 term at ambient pressure. It is shown that in the temperature range below 120 K, the external modes are mainly responsible for the resistivity, while above this temperature the flipping of the CH2 groups becomes important. The linear electron-phonon coupling corresponds to a value of λ between 1 and 1.5.

AB - The temperature dependence of the resistivity of the organic metals and superconductors β-(BEDT-TTF)2I3, β-(BEDT-TTF)2I2Au and αt(BEDT-TTF)2I3 was measured at ambient and at several isotropic pressures (up to 2.5 kbar). By the application of a relatively low pressure, it is possible to measure the term in the resistivity that is linear in temperature. This term is masked by the larger T2 term at ambient pressure. It is shown that in the temperature range below 120 K, the external modes are mainly responsible for the resistivity, while above this temperature the flipping of the CH2 groups becomes important. The linear electron-phonon coupling corresponds to a value of λ between 1 and 1.5.

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Temperature and pressure dependence of the resistivity of β-(BEDT-TTF)₂X (X = I₃, I₂Au) and α_t-(BEDT-TTF)₂I₃

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