| Numéro |
J. Phys. IV France
Volume 09, Numéro PR10, December 1999
International Workshop on Electronic CrystalsECRYS-99 |
|
|---|---|---|
| Page(s) | Pr10-311 - Pr10-314 | |
| DOI | https://doi.org/10.1051/jp4:19991081 | |
International Workshop
on Electronic Crystals
ECRYS-99
J. Phys. IV France 09 (1999) Pr10-311-Pr10-314
DOI: 10.1051/jp4:19991081
1 Department of Applied Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
2 JRCAT, Tsukuba 305, Japan.
© EDP Sciences 1999
ECRYS-99
J. Phys. IV France 09 (1999) Pr10-311-Pr10-314
DOI: 10.1051/jp4:19991081
Photoinduced and current-driven insulator/metal transition in manganites : A fluctuating route
K. Miyano1, T. Tonogai1, T. Satoh1, H. Oshima1 and Y. Tokura21 Department of Applied Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
2 JRCAT, Tsukuba 305, Japan.
Abstract
A class of perovskite manganese oxides undergo photoinduced and current-driven insulator-to-metal transition. The conductance near the transition is quite "noisy" indicating macroscopic fluctuations. The spatial and temporal magnitude of the fluctuations is too large to be accounted for by simple first- order phase transition. An alternative view is proposed that the material is in the two-phase coexistence regime with extremely large fluctuations, reminiscent of the critical phenomena.
© EDP Sciences 1999