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
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.
