| Issue |
J. Phys. IV France
Volume 131, December 2005
|
|
|---|---|---|
| Page(s) | 121 - 122 | |
| DOI | https://doi.org/10.1051/jp4:2005131027 | |
| Published online | 18 January 2006 | |
International Workshop on Electronic Crystals
S. Brazovskii, P. Monceau and N. Kirova
J. Phys. IV France 131 (2005) 121-122
DOI: 10.1051/jp4:2005131027
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) 121-122
DOI: 10.1051/jp4:2005131027
Coherent collective oscillation in the commensurate phase of the TaS3 compound
T. Minami1, Y. Toda1, 2, K. Shimatake1 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
We have investigated ultrafast carrier dynamics in a quasi-one-dimensional metal m-TaS3 by using pump-probe reflectivity measurements. The temperature dependence of transient signal reveals two critical changes at Tp = 240 K and T
100 K. Below Tc, a new low-frequency oscillation mode appears and shows a pronounced softening depending on the temperature, indicating a collective excitation connected with the commensurability of CDW phase. This soft-mode exhibits remarkable polarization anisotropy with respect to the chain direction.
© EDP Sciences 2005