| Issue |
Europhys. Lett.
Volume 38, Number 3, April III 1997
|
|
|---|---|---|
| Page(s) | 219 - 224 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1997-00228-6 | |
| Published online | 01 September 2002 | |
Low-frequency dielectric response of charge-density wave pinned by commensurability in (2,5(OCH3)2DCNQI)2Li
1
Institute of Physics - P.O.Box 304, HR-10000 Zagreb, Croatia
2
Physikalisches Institut, Universität Stuttgart - D-70550 Stuttgart, Germany
3
Laboratoire de Physique des Solides, Université Paris-Sud - 91405 Orsay, France
Received:
28
November
1996
Accepted:
15
March
1997
We have used complex conductivity measurements between 20 Hz and
1 MHz to probe the dielectric response in the low-temperature phase
of the 
organic
conductor. The observed data reveal the existence of the relaxation
process which is well described by a Debye-like expression for an
overdamped response of a system with a single degree of freedom. Both
the static dielectric constant (
) and
the characteristic relaxation time (
) are much larger than
that expected for single-particle excitations. is thermally
activated in a manner similar to the dc conductivity. We attribute the
observed relaxation to N=4 charge density wave pinned by
commensurability to the underlying lattice.
PACS: 71.45.Lr – Charge-density-wave systems / 72.15.Nj – Collective modes (e.g., in one-dimensional conductors)
© EDP Sciences, 1997
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