| Issue |
Europhys. Lett.
Volume 75, Number 2, July 2006
|
|
|---|---|---|
| Page(s) | 301 - 307 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2006-10096-6 | |
| Published online | 14 June 2006 | |
Self-organization of charge under pressure in the organic conductor 
1
Laboratoire de Physique des Solides, UMR8502 - Bat. 510, Centre Universitaire F-91405 Orsay Cédex, France
2
Department of Chemistry, H.C. Oersted Institute - Univeristetsparken 5 DK-2100, Copenhagen, Denmark
Received:
29
March
2006
Accepted:
24
May
2006
presents a phase coexistence between two anion orderings
defined by their wave vectors 
and
in a wide range of pressure (8–11
) and
temperature. From the determination of the anisotropy of the
conductivity and the superconducting transitions in this regime we
were able to extract the texture which results from a
self-organization of the orientations of the 
anions in the
sample. At the lowest pressures, the metallic parts, related to the
q3 order, form droplets elongated along the a-axis embedded in
the semiconducting matrix associated with the q2 order. Above
10, filaments along the a-axis extend from one end of the
sample to the other nearly up to the end of the coexistence regime.
A mapping of the system into an anisotropic Ising lattice is
satisfactory to analyze the data.
PACS: 74.70.Kn – Organic superconductors / 72.60.+g – Mixed conductivity and conductivity transitions / 72.80.Le – Polymers; organic compounds (including organic semiconductors)
© EDP Sciences, 2006
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