Isotope effects in the raman spectra of BEDT-TTF and ß-(BEDT-TTF)2I3

G. Leising; S. Lefrant; J. P. Buisson; W. Kang; C. Lenoir; P. Batail; D. Jerome

doi:10.1016/0379-6779(91)92035-G

Isotope effects in the raman spectra of BEDT-TTF and ß-(BEDT-TTF)₂I₃

G. Leising, S. Lefrant, J. P. Buisson, W. Kang, C. Lenoir, P. Batail, D. Jerome

Department of Physics

Research output: Contribution to journal › Article › peer-review

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Abstract

We have performed a Raman spectroscopic investigation on ¹³C enriched BEDT-TTF molecules which has been motivated by isotope shift experiments of the superconducting transition in the ß_H phase of (BEDT-TTF)₂I₃ (T_c ≈ 8.2K at mid transition) stabilized at low temperature via the adequate cooling procedure. In the C=C stretching region, two main bands are observed at 1521 and 1468 cm^-1, shifted downward compared to the 1555 and 1495 cm^-1 in ¹²C BEDT-TTF, and simple calculations predict very well this shift. Also, these bands are recorded with different intensities. In the Raman spectrum, the 1512 cm^-1 mode, assigned to a combination mode, presumbly appears much weaker at 1485 cm^-1.

Original language	English
Pages (from-to)	2137-2140
Number of pages	4
Journal	Synthetic Metals
Volume	42
Issue number	1-2
DOIs	https://doi.org/10.1016/0379-6779(91)92035-G
State	Published - 15 May 1991

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@article{034a787c92da4dde9bafb39534fc4bb8,

title = "Isotope effects in the raman spectra of BEDT-TTF and {\ss}-(BEDT-TTF)2I3",

abstract = "We have performed a Raman spectroscopic investigation on 13C enriched BEDT-TTF molecules which has been motivated by isotope shift experiments of the superconducting transition in the {\ss}H phase of (BEDT-TTF)2I3 (Tc ≈ 8.2K at mid transition) stabilized at low temperature via the adequate cooling procedure. In the C=C stretching region, two main bands are observed at 1521 and 1468 cm-1, shifted downward compared to the 1555 and 1495 cm-1 in 12C BEDT-TTF, and simple calculations predict very well this shift. Also, these bands are recorded with different intensities. In the Raman spectrum, the 1512 cm-1 mode, assigned to a combination mode, presumbly appears much weaker at 1485 cm-1.",

author = "G. Leising and S. Lefrant and Buisson, {J. P.} and W. Kang and C. Lenoir and P. Batail and D. Jerome",

year = "1991",

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doi = "10.1016/0379-6779(91)92035-G",

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T1 - Isotope effects in the raman spectra of BEDT-TTF and ß-(BEDT-TTF)2I3

AU - Leising, G.

AU - Lefrant, S.

AU - Buisson, J. P.

AU - Kang, W.

AU - Lenoir, C.

AU - Batail, P.

AU - Jerome, D.

PY - 1991/5/15

Y1 - 1991/5/15

N2 - We have performed a Raman spectroscopic investigation on 13C enriched BEDT-TTF molecules which has been motivated by isotope shift experiments of the superconducting transition in the ßH phase of (BEDT-TTF)2I3 (Tc ≈ 8.2K at mid transition) stabilized at low temperature via the adequate cooling procedure. In the C=C stretching region, two main bands are observed at 1521 and 1468 cm-1, shifted downward compared to the 1555 and 1495 cm-1 in 12C BEDT-TTF, and simple calculations predict very well this shift. Also, these bands are recorded with different intensities. In the Raman spectrum, the 1512 cm-1 mode, assigned to a combination mode, presumbly appears much weaker at 1485 cm-1.

AB - We have performed a Raman spectroscopic investigation on 13C enriched BEDT-TTF molecules which has been motivated by isotope shift experiments of the superconducting transition in the ßH phase of (BEDT-TTF)2I3 (Tc ≈ 8.2K at mid transition) stabilized at low temperature via the adequate cooling procedure. In the C=C stretching region, two main bands are observed at 1521 and 1468 cm-1, shifted downward compared to the 1555 and 1495 cm-1 in 12C BEDT-TTF, and simple calculations predict very well this shift. Also, these bands are recorded with different intensities. In the Raman spectrum, the 1512 cm-1 mode, assigned to a combination mode, presumbly appears much weaker at 1485 cm-1.

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ER -

Isotope effects in the raman spectra of BEDT-TTF and ß-(BEDT-TTF)2I3

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Isotope effects in the raman spectra of BEDT-TTF and ß-(BEDT-TTF)₂I₃