Geometrical isotope effect induced by deuteration of κ-(BEDT-TTF)2X (X=CuN(CN)2Br and Cu(NCS)2)

Y. Watanabe; T. Shimazu; Takahiko Sasaki; N. Toyota

doi:10.1016/S0379-6779(97)80963-0

Geometrical isotope effect induced by deuteration of κ-(BEDT-TTF)₂X (X=CuN(CN)₂Br and Cu(NCS)₂)

Y. Watanabe, T. Shimazu, Takahiko Sasaki, N. Toyota

Institute for Materials Research (IMR)

Research output: Contribution to journal › Conference article › peer-review

Abstract

We report thermal expansion measurements by four-circle X-ray diffraction (300K-12K) on the title superconductors based on hydrogenated and deuterated BEDT-TTF's. The fractional changes in lattice parameters induced by deuteration are at the lowest temperatures just above T_c: +0.11% and +0.03% for c- and a- axis for CuN(CN)₂Br salts, and -0.1% for c-axis of Cu(NCS)₂ salt, while other parameters remain unchanged within an experimental error. These significant changes are considered to be caused by a geometrical isotope effect for both the ethylene group and the hydrogen bonding to anionic ligands.

Original language	English
Pages (from-to)	1917-1918
Number of pages	2
Journal	Synthetic Metals
Volume	86
Issue number	1 -3 pt 3
DOIs	https://doi.org/10.1016/S0379-6779(97)80963-0
Publication status	Published - 1997 Jan 1
Event	Proceedings of the 1996 International Conference on Science and Technology of Synthetic Metals, ICSM'96. Part 3 (of 3) - Snowbird, UT, USA Duration: 1996 Jul 28 → 1996 Aug 2

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Geometrical isotope effect induced by deuteration of κ-(BEDT-TTF)2X (X=CuN(CN)2Br and Cu(NCS)2)",

abstract = "We report thermal expansion measurements by four-circle X-ray diffraction (300K-12K) on the title superconductors based on hydrogenated and deuterated BEDT-TTF's. The fractional changes in lattice parameters induced by deuteration are at the lowest temperatures just above Tc: +0.11% and +0.03% for c- and a- axis for CuN(CN)2Br salts, and -0.1% for c-axis of Cu(NCS)2 salt, while other parameters remain unchanged within an experimental error. These significant changes are considered to be caused by a geometrical isotope effect for both the ethylene group and the hydrogen bonding to anionic ligands.",

author = "Y. Watanabe and T. Shimazu and Takahiko Sasaki and N. Toyota",

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doi = "10.1016/S0379-6779(97)80963-0",

language = "English",

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TY - JOUR

T1 - Geometrical isotope effect induced by deuteration of κ-(BEDT-TTF)2X (X=CuN(CN)2Br and Cu(NCS)2)

AU - Watanabe, Y.

AU - Shimazu, T.

AU - Sasaki, Takahiko

AU - Toyota, N.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - We report thermal expansion measurements by four-circle X-ray diffraction (300K-12K) on the title superconductors based on hydrogenated and deuterated BEDT-TTF's. The fractional changes in lattice parameters induced by deuteration are at the lowest temperatures just above Tc: +0.11% and +0.03% for c- and a- axis for CuN(CN)2Br salts, and -0.1% for c-axis of Cu(NCS)2 salt, while other parameters remain unchanged within an experimental error. These significant changes are considered to be caused by a geometrical isotope effect for both the ethylene group and the hydrogen bonding to anionic ligands.

AB - We report thermal expansion measurements by four-circle X-ray diffraction (300K-12K) on the title superconductors based on hydrogenated and deuterated BEDT-TTF's. The fractional changes in lattice parameters induced by deuteration are at the lowest temperatures just above Tc: +0.11% and +0.03% for c- and a- axis for CuN(CN)2Br salts, and -0.1% for c-axis of Cu(NCS)2 salt, while other parameters remain unchanged within an experimental error. These significant changes are considered to be caused by a geometrical isotope effect for both the ethylene group and the hydrogen bonding to anionic ligands.

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DO - 10.1016/S0379-6779(97)80963-0

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EP - 1918

JO - Synthetic Metals

JF - Synthetic Metals

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T2 - Proceedings of the 1996 International Conference on Science and Technology of Synthetic Metals, ICSM'96. Part 3 (of 3)

Y2 - 28 July 1996 through 2 August 1996

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Geometrical isotope effect induced by deuteration of κ-(BEDT-TTF)₂X (X=CuN(CN)₂Br and Cu(NCS)₂)

Abstract

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