Impurity-induced 900 °C (2×2) surface reconstruction of SrTiO3(100)

Jens E.T. Andersen; Preben J. Møller

doi:10.1063/1.103223

Impurity-induced 900 °C (2×2) surface reconstruction of SrTiO₃(100)

Jens E.T. Andersen, Preben J. Møller

Chemical & Forensic Sciences

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

A p(2×2)surface reconstruction is observed over the 800-900 °C range for SrTiO₃ (100), the temperature range which is used in the oxygen anneal of Y, Ba, Cu layers on SrTiO₃ (100) substrates in the synthesis of high T_c superconducting thin films. As observed by Auger electron spectroscopy, high-temperature annealing causes calcium to segregate to the surface. Initially, at a Ca content of 3% upon a SrO-terminated SrTiO₃ (100) surface, the Ca atom is incorporated in a superstructure, which is attributed to multiple scattering across the two topmost interfaces. When the surface Ca content is below 1% the p(2×2) surface reconstruction is induced. The p(2×2) surface reconstruction disappears when the calcium content is removed.

Original language	English
Pages (from-to)	1847-1849
Number of pages	3
Journal	Applied Physics Letters
Volume	56
Issue number	19
DOIs	https://doi.org/10.1063/1.103223
Publication status	Published - 1990

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.103223

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title = "Impurity-induced 900 °C (2×2) surface reconstruction of SrTiO3(100)",

abstract = "A p(2×2)surface reconstruction is observed over the 800-900 °C range for SrTiO3 (100), the temperature range which is used in the oxygen anneal of Y, Ba, Cu layers on SrTiO3 (100) substrates in the synthesis of high Tc superconducting thin films. As observed by Auger electron spectroscopy, high-temperature annealing causes calcium to segregate to the surface. Initially, at a Ca content of 3% upon a SrO-terminated SrTiO3 (100) surface, the Ca atom is incorporated in a superstructure, which is attributed to multiple scattering across the two topmost interfaces. When the surface Ca content is below 1% the p(2×2) surface reconstruction is induced. The p(2×2) surface reconstruction disappears when the calcium content is removed.",

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AU - Andersen, Jens E.T.

AU - Møller, Preben J.

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N2 - A p(2×2)surface reconstruction is observed over the 800-900 °C range for SrTiO3 (100), the temperature range which is used in the oxygen anneal of Y, Ba, Cu layers on SrTiO3 (100) substrates in the synthesis of high Tc superconducting thin films. As observed by Auger electron spectroscopy, high-temperature annealing causes calcium to segregate to the surface. Initially, at a Ca content of 3% upon a SrO-terminated SrTiO3 (100) surface, the Ca atom is incorporated in a superstructure, which is attributed to multiple scattering across the two topmost interfaces. When the surface Ca content is below 1% the p(2×2) surface reconstruction is induced. The p(2×2) surface reconstruction disappears when the calcium content is removed.

AB - A p(2×2)surface reconstruction is observed over the 800-900 °C range for SrTiO3 (100), the temperature range which is used in the oxygen anneal of Y, Ba, Cu layers on SrTiO3 (100) substrates in the synthesis of high Tc superconducting thin films. As observed by Auger electron spectroscopy, high-temperature annealing causes calcium to segregate to the surface. Initially, at a Ca content of 3% upon a SrO-terminated SrTiO3 (100) surface, the Ca atom is incorporated in a superstructure, which is attributed to multiple scattering across the two topmost interfaces. When the surface Ca content is below 1% the p(2×2) surface reconstruction is induced. The p(2×2) surface reconstruction disappears when the calcium content is removed.

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Impurity-induced 900 °C (2×2) surface reconstruction of SrTiO₃(100)

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