Title of article
Direct measurements of optical phonons in SrTiO3 nanosystems
Author/Authors
D Wolpert، نويسنده , , K Korolev، نويسنده , , S Sachs، نويسنده , , J Knab، نويسنده , , W Cox، نويسنده , , J Cerne، نويسنده , , A.G Markelz، نويسنده , , T Zhao، نويسنده , , R Ramesh، نويسنده , , B.H Moeckly، نويسنده ,
Issue Information
دوهفته نامه با شماره پیاپی سال 2003
Pages
4
From page
236
To page
239
Abstract
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.
Keywords
Mode softening , Phonons , Terahertz , Finite size , Ferroelectrics , Strontium titanate
Journal title
Physica E Low-dimensional Systems and Nanostructures
Serial Year
2003
Journal title
Physica E Low-dimensional Systems and Nanostructures
Record number
1050847
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