Direct measurements of optical phonons in SrTiO3 nanosystems

Publication Type

Journal Article

Authors

DOI

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. © 2003 Elsevier B.V. All rights reserved.

Journal

Physica E: Low-Dimensional Systems and Nanostructures

Volume

19

Year of Publication

2003

ISSN

13869477

Research Areas