| Issue |
J. Phys. IV France
Volume 12, Number 9, November 2002
|
|
|---|---|---|
| Page(s) | 297 - 301 | |
| DOI | https://doi.org/10.1051/jp4:20020419 | |
J. Phys. IV France 12 (2002) Pr9-297
DOI: 10.1051/jp4:20020419
Photocontrol of a dynamic phase transition in the CDW state
K. Miyano and N. OgawaDepartment of Materials and Devices, Photonic Materials, Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
Abstract
A strong photoinduced suppression of the creep to slide dynamic phase transition was discovered in a
quasi one-dimensional CDW material, K
0.3MoO
3. It is manifested in hysteretic "photoresistivity", an increase in the
resistance by orders of magnitude under the illumination of light of modest intensity. Based on a wide range of
measurements, it is concluded that the effect is due to the release of the internal stress by photoexcited jumps of the
CDW phase over pinning sites: a phenomenon which can be effective only in a system, in which the thermally
excited quasiparticles are negligibly small and hence the `bare' CDW properties emerge.
© EDP Sciences 2002