TY - JOUR
KW - Thin films
KW - Ferroelectric materials
KW - Phonons
KW - Strontium compounds
KW - Dielectric properties
KW - Nanosystems
AU - D Wolpert
AU - K Korolev
AU - S Sachs
AU - J Knab
AU - W Cox
AU - J Cerne
AU - A.G Markelz
AU - T Zhao
AU - Ramamoorthy Ramesh
AU - B.H Moeckly
AB - We use terahertz time domain spectroscopy to examine finite size effects on the optical phonon modes in SrTiO3 thin films. In temperature-dependent measurements we find a near absence of mode softening in the TO1 phonon frequency. Furthermore we see an increase in the soft mode frequency with reduced thickness. Both of these results correlate well with the reduced dielectric response observed for nanoscale ferroelectric systems. © 2003 Elsevier B.V. All rights reserved.
BT - Physica E: Low-Dimensional Systems and Nanostructures
DO - 10.1016/S1386-9477(03)00305-9
LA - eng
M1 - 1-2
N1 - cited By 3
N2 - We use terahertz time domain spectroscopy to examine finite size effects on the optical phonon modes in SrTiO3 thin films. In temperature-dependent measurements we find a near absence of mode softening in the TO1 phonon frequency. Furthermore we see an increase in the soft mode frequency with reduced thickness. Both of these results correlate well with the reduced dielectric response observed for nanoscale ferroelectric systems. © 2003 Elsevier B.V. All rights reserved.
PB - Elsevier
PY - 2003
SP - 236
EP - 239
T2 - Physica E: Low-Dimensional Systems and Nanostructures
TI - Direct measurements of optical phonons in SrTiO3 nanosystems
VL - 19
SN - 13869477
ER -