Volume 60, Number 3, November I 2002
|Page(s)||460 - 466|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 October 2002|
Ultrafast carrier relaxation dynamics in single-layer cuprates
Physics Department, University of Wisconsin-Madison
- Madison, WI 53706, USA
2 Los Alamos National Laboratory - Los Alamos, NM, USA
3 Physics Department, Vanderbilt University - Nashville, TN, USA
4 Institute of Physics, Polish Academy of Sciences - PL-02904 Warszawa, Poland
5 Department of Electrical and Computer Engineering and Laboratory for Laser Energetics, University of Rochester - Rochester, NY 14627, USA
6 Humboldt-Universität, Institut für Physik - Invalidenstrasse 110 D-10115 Berlin, Germany
7 Applied Sciences Department, College of William and Mary - Williamsburg, VA, USA
8 Physics Department, Pennsylvania State University - University Park, PA, USA
9 OXXEL GmbH, Technologiepark Universitaet - Fahrenheitstrasse 9 Bremen, D-28359, Germany
Accepted: 22 August 2002
Using a femtosecond pump-probe optical technique, we measured the time-resolv ed change in reflectivity of three single-layer cuprate samples, including x , and x grown on . We analyze the data in terms of a nonthermal electron relaxation model, and obtain quantitative agreement between the model and the data. The initial electron-electron thermalization process is much longer in the superconducting samples as opposed to the overdoped nonsuperconducting sample, suggesting a bottleneck in electron thermalization process due to the presence of the superconducting gap.
PACS: 78.47.+p – Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter / 74.72.-h – High- compounds / 74.76.Bz – High- films
© EDP Sciences, 2002
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