Point defects at cleaved Srn+1Run O3n+1 (001) surfaces

Bernhard Stöger; Marcel Hieckel; Florian Mittendorfer; Zhiming Wang; Michael Schmid; Gareth S. Parkinson; David Fobes; Jin Peng; John E. Ortmann; Andreas Limbeck; Zhiqiang Mao; Josef Redinger; Ulrike Diebold

doi:10.1103/PhysRevB.90.165438

Point defects at cleaved Srn+1Run O3n+1 (001) surfaces

Bernhard Stöger, Marcel Hieckel, Florian Mittendorfer, Zhiming Wang, Michael Schmid, Gareth S. Parkinson, David Fobes, Jin Peng, John E. Ortmann, Andreas Limbeck, Zhiqiang Mao, Josef Redinger, Ulrike Diebold

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11 Scopus citations

Abstract

The (001) surfaces of cleaved Sr3Ru2O7 and Sr2RuO4 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.

Original language	English (US)
Article number	165438
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	90
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.90.165438
State	Published - Oct 30 2014

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.90.165438

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title = "Point defects at cleaved Srn+1Run O3n+1 (001) surfaces",

abstract = "The (001) surfaces of cleaved Sr3Ru2O7 and Sr2RuO4 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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doi = "10.1103/PhysRevB.90.165438",

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T1 - Point defects at cleaved Srn+1Run O3n+1 (001) surfaces

AU - Stöger, Bernhard

AU - Hieckel, Marcel

AU - Mittendorfer, Florian

AU - Wang, Zhiming

AU - Schmid, Michael

AU - Parkinson, Gareth S.

AU - Fobes, David

AU - Peng, Jin

AU - Ortmann, John E.

AU - Limbeck, Andreas

AU - Mao, Zhiqiang

AU - Redinger, Josef

AU - Diebold, Ulrike

PY - 2014/10/30

Y1 - 2014/10/30

N2 - The (001) surfaces of cleaved Sr3Ru2O7 and Sr2RuO4 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.

AB - The (001) surfaces of cleaved Sr3Ru2O7 and Sr2RuO4 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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ER -

Point defects at cleaved Srn+1Run O3n+1 (001) surfaces

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