Electric Response of Sliding CDW in Blue Bronzes
- 1 January 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (S3-1)
- https://doi.org/10.7567/jjaps.26s3.609
Abstract
The narrow band noise and pulse response measurements were done in the blue bronzes (K0.3MoO3, Rb0.3MoO3) to investigate the sliding motion of CDW. From noise spectra under dc bias current, the ratio of washboard frequency to the CDW carrying current density F1/JCDW was obtained as 11 and 14 kHz/A cm-2 in K0.3MoO3 and Rb0.3MoO3 and Rb0.3MoO3, respectively. These values well agree with the calculated ones due to the washboard model (F1/JCDW=1/enλ) and indicate that the CDW is sliding uniformly in a whole crystal. The transient oscillation of voltage response to a current pulse was also observed in the same samples and their frequencies were about twice as large as those of the narrow band noise. This suggests that the CDW begins to slide through limited cross sectional area at the initial stage of sliding CDW relaxes to the uniformly sliding state, which is stationary state under dc bias current.Keywords
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