A novel, layered phase in Ti-rich SrTiO3 epitaxial thin films

Sungki Lee; Anoop R Damodaran; Prashun Gorai; Nuri Oh; Jarrett A Moyer; Ji-Hwan Kwon; Naheed Ferdous; Amish Shah; Zuhuang Chen; Eric Breckenfeld; R V K Mangalam; Paul V Braun; Peter Schiffer; Moonsub Shim; Jian-Min Zuo; Elif Ertekin; Lane W Martin

doi:10.1002/adma.201403602

A novel, layered phase in Ti-rich SrTiO3 epitaxial thin films

Adv Mater. 2015 Feb 4;27(5):861-8. doi: 10.1002/adma.201403602. Epub 2014 Dec 18.

Authors

Sungki Lee¹, Anoop R Damodaran, Prashun Gorai, Nuri Oh, Jarrett A Moyer, Ji-Hwan Kwon, Naheed Ferdous, Amish Shah, Zuhuang Chen, Eric Breckenfeld, R V K Mangalam, Paul V Braun, Peter Schiffer, Moonsub Shim, Jian-Min Zuo, Elif Ertekin, Lane W Martin

Affiliation

¹ Department of Materials Science and Engineering, University of California Berkeley, Berkeley, California, 94720, USA.

PMID: 25523179
DOI: 10.1002/adma.201403602

Abstract

Sr2Ti7O14, a new phase, is synthesized by leveraging the innate chemical and thermo-dynamic instabilities in the SrTiO3-TiO2 system and non-equilibrium growth techniques. The chemical composition, epitaxial relationships, and orientation play roles in the formation of this novel layered phase, which, in turn, possesses unusual charge ordering, anti-ferromagnetic ordering, and low, glass-like thermal conductivity.

Keywords: eutectic; self-assembly; spontaneous phase separation; strontium titanate.