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  Uniaxial strain induced band splitting in semiconducting SrTiO3

Chang, Y. J., Khalsa, G., Moreschini, L., Walter, A. L., Bostwick, A., Horn, K., et al. (2013). Uniaxial strain induced band splitting in semiconducting SrTiO3. Physical Review B, 87(11): 115212. doi:10.1103/PhysRevB.87.115212.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0014-A2A7-0 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0014-A2A8-E
Genre: Journal Article

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PhysRevB.87.115212.pdf (Publisher version), 2MB
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https://hdl.handle.net/11858/00-001M-0000-0014-A2A9-C
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2013
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APS
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 Creators:
Chang, Young Jun1, 2, 3, Author
Khalsa, Guru4, Author
Moreschini, Luca1, Author
Walter, Andrew L.1, 2, Author           
Bostwick, Aaron1, Author
Horn, Karsten2, Author           
MacDonald, A. H.4, Author
Rotenberg, Eli1, Author
Affiliations:
1Advanced Light Source (ALS), E. O. Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA, ou_persistent22              
2Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
3Department of Physics, University of Seoul, Seoul 130-743, Korea, ou_persistent22              
4Department of Physics, University of Texas at Austin, 1 University Station C1600, Austin, Texas 78712, USA, ou_persistent22              

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 Abstract: 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.

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Language(s): eng - English
 Dates: 2013-02-022012-04-122013-03-292013-03-29
 Publication Status: Issued
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevB.87.115212
 Degree: -

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Title: Physical Review B
Source Genre: Journal
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Publ. Info: Woodbury, NY : Published by the American Physical Society through the American Institute of Physics
Pages: - Volume / Issue: 87 (11) Sequence Number: 115212 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008