Uniaxial strain induced band splitting in semiconducting SrTiO3

Young Jun Chang, Guru Khalsa, Luca Moreschini, Andrew L. Walter, Aaron Bostwick, Karsten Horn, A. H. MacDonald, Eli Rotenberg

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


We use angle-resolved photoemission spectroscopy to study the influence of mechanically induced uniaxial strain on the electronic structure of the oxide semiconductor SrTiO3. We observe an orbital splitting between the Ti 3dyz and 3dxy bands, which are degenerate when unperturbed. Using the k·p method, we qualitatively explain the direction and the size of the observed energy splitting. Our comprehensive understanding of band splitting explains the strain induced mobility enhancement of electron-doped SrTiO33 in terms of band degeneracy breaking and reduced interband scattering. Our approach can be extended to differently strained oxide systems.

Original languageEnglish
Article number115212
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number11
StatePublished - 29 Mar 2013


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