| Issue |
Europhys. Lett.
Volume 56, Number 3, November 2001
|
|
|---|---|---|
| Page(s) | 434 - 440 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00537-2 | |
| Published online | 01 December 2003 | |
Microwave and millimeter wave spectroscopy in the slightly hole-doped ladders of Sr14Cu24O41
1
Department of Basic Science, The University of Tokyo
Meguro-ku, Tokyo 153-8902, Japan
2
Department of Advanced Materials Science, The University of Tokyo
Bunkyo-ku, Tokyo 113-8656, Japan
3
CREST, Japan Science and Technology Corporation (JST)
Kawaguchi 332-0012, Japan
Received:
12
February
2001
Accepted:
3
August
2001
We have measured the temperature and frequency dependence of
the microwave and millimeter wave conductivity 
along both the ladder (c-axis) and the leg (a-axis) directions in
Sr14Cu24O41.
Below a temperature T* (
),
we observed a stronger frequency dependence in
than that in 
,
forming a small resonance peak developed
between 30 GHz and 100 GHz.
We also observed nonlinear dc conduction along
the c-axis at rather low electric fields below T*.
These results suggest some collective excitation contributes to
the c-axis charge dynamics of the slightly hole-doped ladders of
Sr14Cu24O41 below T*.
PACS: 72.15.Nj – Collective modes (e.g., in one-dimensional conductors) / 74.25.Nf – Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.) / 74.72.Jt – Other cuprates
© EDP Sciences, 2001
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