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Thermal conductivity as a metric for the crystalline quality of SrTiO 3 epitaxial layers

Publication Type

Journal Article

Authors

Oh, D.-W, J Ravichandran, C.-W Liang, W Siemons, B Jalan, C.M Brooks, M Huijben, D.G Schlom, S Stemmer, L.W Martin, A Majumdar, Ramamoorthy Ramesh, D.G Cahill

DOI

10.1063/1.3579993

Abstract

Measurements of thermal conductivity by time-domain thermoreflectance in the temperature range 100<T<300 K are used to characterize the crystalline quality of epitaxial layers of a prototypical oxide, SrTiO3. Twenty samples from five institutions using two growth techniques, molecular beam epitaxy and pulsed laser deposition (PLD), were analyzed. Optimized growth conditions produce layers with comparable to bulk single crystals. Many PLD layers, particularly those that use ceramics as the target material, show surprisingly low . For homoepitaxial layers, the decrease in created by point defects correlates well with the expansion of the lattice parameter in the direction normal to the surface. © 2011 American Institute of Physics.

Journal

Applied Physics Letters

Volume

Year of Publication

2011

ISSN

00036951

Notes

cited By 52

Research Areas

Ramesh Lab