Record link: 
http://hdl.handle.net/20.500.12708/157156
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Title: 
Point defects at cleaved Srₙ₊₁RuₙO₃ₙ₊₁(001) surfaces
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Citation: 
Stöger, B., Hieckel, M., Mittendorfer, F., Wang, Z., Schmid, M., Parkinson, G. S., Fobes, D., Peng, J., Ortmann, J. E., Limbeck, A., Mao, Z., Redinger, J., & Diebold, U. (2014). Point defects at cleaved Srₙ₊₁RuₙO₃ₙ₊₁(001) surfaces. Physical Review B, 90(16). https://doi.org/10.1103/physrevb.90.165438
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Publisher DOI: 
10.1103/physrevb.90.165438
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Publication Type: 
Article - Original Research Article
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Language: 
English
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Authors: 
Stöger, Bernhard 
Hieckel, Marcel 
Mittendorfer, Florian 
Wang, Zhiming 
Schmid, Michael 
Parkinson, Gareth S. 
Fobes, David 
Peng, Jin 
Ortmann, John E. 
Limbeck, Andreas 
Mao, Zhiqiang 
Redinger, Josef 
Diebold, Ulrike 
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Organisational Unit: 
E134-01 - Forschungsbereich Applied and Computational Physics 
E134-05 - Forschungsbereich Surface Physics 
E164-01-2 - Forschungsgruppe Oberflächen-, Spurenanalytik und Chemometrie 
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Journal: 
Physical Review B 
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ISSN: 
2469-9950
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Date (published): 
15-Oct-2014
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Number of Pages: 
6
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Publisher: 
AMER PHYSICAL SOC
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Peer reviewed: 
Yes
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Keywords: 
Condensed Matter Physics; Electronic, Optical and Magnetic Materials
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Abstract: 
The (001) surfaces of cleaved Sr3 Ru2 O7 and Sr2 RuO4 samples were investigated using low-temperature scanning tunneling microscopy and density functional theory calculations. Intrinsic defects are not created during cleaving. This experimental observation is consistent with calculations, where the formation energy for a Sr and O vacancy, 4.19 eV and 3.81 eV, respectively, is significantly larger than that required to cleave the crystal, 1.11 eV/(1 × 1) unit cell. Surface oxygen vacancies can be created through electron bombardment, however, and their appearance is shown to vary strongly with the imaging conditions. Point defects observed on as-cleaved surfaces result from bulk impurities and adsorption from the residual gas.
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Research Areas: 
Materials Characterization: 100%
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Science Branch: 
Physik, Astronomie
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