| Issue |
J. Phys. IV France
Volume 09, Number PR10, December 1999
International Workshop on Electronic CrystalsECRYS-99 |
|
|---|---|---|
| Page(s) | Pr10-161 - Pr10-163 | |
| DOI | https://doi.org/10.1051/jp4:19991041 | |
International Workshop
on Electronic Crystals
ECRYS-99
J. Phys. IV France 09 (1999) Pr10-161-Pr10-163
DOI: 10.1051/jp4:19991041
1 Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
2 Institute for Solid State Physics, University of Tokyo, Roppongi, Tokyo, Japan
© EDP Sciences 1999
ECRYS-99
J. Phys. IV France 09 (1999) Pr10-161-Pr10-163
DOI: 10.1051/jp4:19991041
Macroscopic quantum tunneling of charge density waves
H. Matsukawa1, H. Miyake1, M. Yumoto1 and H. Fukuyama21 Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
2 Institute for Solid State Physics, University of Tokyo, Roppongi, Tokyo, Japan
Abstract
We study the quantum tunneling of CDW theoretically based on the extended Fukuyama-Lee-Rice model in
which the vortex excitation is allowed. By considering both bulk and edge processes we can explain the experimental results
of the I-V characteristic and the condition for the observation of the tunneling current. We also study the classical depinning
problem of commensurate CDW interacting with an impurity. It turns out that the impurity can assist the depinning, that is, the
threshold field in the presence of impurity can be lower than that in its absence.
© EDP Sciences 1999