| Issue |
Europhys. Lett.
Volume 35, Number 3, July 1996
|
|
|---|---|---|
| Page(s) | 221 - 226 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1996-00558-3 | |
| Published online | 01 September 2002 | |
Dielectric spectroscopy on the quasi–one-dimensional organic charge density wave conductor (Fluoranthene)2PF6
1
Physikalisches Institut und Bayreuther Institut für Makromolekülforschung,
Universität Bayreuth - D-95440 Bayreuth, Germany
2
IBM Research Division, Zurich Research Laboratory CH-8803 Rüschlikon,
Switzerland
Received:
27
March
1996
Accepted:
5
June
1996
Frequency-dependent complex conductivity measurements
on the organic quasi–one-dimensional CDW system 
between 
and 
at temperatures ranging from
20 K to 290 K are reported. Below the temperature of the Peierls transition
(
)
the real part of the conductivity exhibits
two structures, which can be attributed to two modes of the
charge density wave (CDW): a temperature-dependent
low-frequency relaxational mode of local oscillating deformations
and a high-frequency resonant mode of the pinned CDW as a whole.
The measurements indicate that the damping of the relaxational mode is dominated
by free carriers in the covered temperature range.
At low temperatures the dynamics of the CDW in 
shows features
characteristic of the transition into a glass-like state.
PACS: 71.45.Lr – Charge-density-wave systems / 72.15.Nj – Collective modes (e.g., in one-dimensional conductors) / 77.22.Gm – Dielectric loss and relaxation
© EDP Sciences, 1996
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