Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: C1.00162 : Effect of substrate strain on the charge dynamics of Nd$_{0.5}$Sr$_{0.5}$MnO$_3$ investigated by pump-probe technique
Author:
We present the polarization and time dependent transmittance of
Nd$_{0.5}$Sr$_{0.5}$MnO$_{3}$ (NSMO) thin films grown on
SrTiO$_3$ (STO) (100) and STO (110) substrates. We used the
normal transmission technique and the pump-probe technique for
the measurement. While the transmittance of NSMO film on STO
(100) is isotropic, the transmittance of NSMO on STO (110)
measured with the electric field parallel to [-110] direction
(E$//$[-110]) is larger than that of E$//$[100]. The time
dependent transmittance change of NSMO film on STO (100) shows
a sharp increase near the zero time delay and exponential
decreases as the time delay between the pump and the probe
pulse increases. The transmittance change of NSMO film on STO
(110) shows almost the same time dependence. The time dependent
transmittance change of NSMO film on STO (100) shows no
significant polarization direction dependence, however the
magnitude of time dependent transmittance change of NSMO on STO
(110) is different depending on the polarization direction. The
mechanism of the polarization dependence of transmittance
change and the polarization direction independent relaxation
will be discussed in terms of the substrate strain and its
effect on the charge dynamics.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.C1.162
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