| Issue |
J. Phys. IV France
Volume 131, December 2005
|
|
|---|---|---|
| Page(s) | 295 - 298 | |
| DOI | https://doi.org/10.1051/jp4:2005131075 | |
| Published online | 18 January 2006 | |
International Workshop on Electronic Crystals
S. Brazovskii, P. Monceau and N. Kirova
J. Phys. IV France 131 (2005) 295-298
DOI: 10.1051/jp4:2005131075
1 Department of Applied Physics, Hokkaido University, Sapporo 060-8628, Japan
2 PRESTO Japan Science and Technology Agency, Saitama 332-0012, Japan
© EDP Sciences 2005
S. Brazovskii, P. Monceau and N. Kirova
J. Phys. IV France 131 (2005) 295-298
DOI: 10.1051/jp4:2005131075
Ultrafast optical study of the CDW phase transition in topological crystals
K. Shimatake1, Y. Toda1, 2, T. Minami1 and S. Tanda11 Department of Applied Physics, Hokkaido University, Sapporo 060-8628, Japan
2 PRESTO Japan Science and Technology Agency, Saitama 332-0012, Japan
Abstract
Influence of the crystal topology on the Peierls transition was
investigated by means of ultrafast optical pump-probe measurements.
The comparison of the exponential single particle decay between the
whisker and ring NbSe3 compounds reveals several pronounced
differences around a phase transition temperature (
). A
discrepancy from BCS-like temperature dependence of the gap was
observed in the ring, suggesting a loss of phase coherence between
adjacent chains in the closed-loop topology.
© EDP Sciences 2005