| Numéro |
J. Phys. IV France
Volume 114, April 2004
|
|
|---|---|---|
| Page(s) | 517 - 519 | |
| DOI | https://doi.org/10.1051/jp4:2004114121 | |
J. Phys. IV France 114 (2004) 517
DOI: 10.1051/jp4:2004114121
Incommensurate structure and the superconducting properties of the
organic superconductor (MDT-ST)(I
T. Kawamoto1, 1, T. Mori1, T. Terashima2, S. Uji2, H. Kitagawa3, K. Takimiya4, A. Takamori4 and T. Otsubo4
1 Department of Oragnic and Polymeric Materials, Tokyo Institute of Technology, Tokyo 152-8552, Japan
2 National Institute for Materials Science, Tsukuba, Ibaraki 305-0003, Japan
3 Department of Chemistry, Kyushu University, Fukuoka 812-8581, Japan
4 Department of Applied Chemistry, Hiroshima University, Hiroshima 739-8527, Japan
Abstract
The charge-transfer degree and the superconducting
properties of the organic superconductor (MDT-ST)I
have been
studied [ MDT-ST:
5
H-2-(1,3-dithiol-2-ylidene)-1,3-diselena-4,6-dithiapentalene] . The Raman
spectrum and the x-ray oscillation photograph show that the polyiodide chain
is composed of I
3-, which is incommensurate to the donor lattice.
The chemical composition is determined to be (MDT-ST)(I
3)0.417.
The upper critical fields are within the Clogston-Chandrasekhar paramagnetic
limit in all directions, and the coherence lengths are longer than the
thickness of the conducting sheet.
Key words. Organic superconductor - incommensurate crystal -
upper critical field.
© EDP Sciences 2004