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

Jens E.T. Andersen, Preben J. Møller

Research output: Contribution to journalArticle

32 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 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.

Original languageEnglish
Pages (from-to)1847-1849
Number of pages3
JournalApplied Physics Letters
Volume56
Issue number19
DOIs
Publication statusPublished - Dec 1 1990

Fingerprint

impurities
calcium
Auger spectroscopy
electron spectroscopy
annealing
causes
oxygen
synthesis
thin films
scattering
atoms
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

@article{7e0c31f7edba4807a47bda5be2dd906e,
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.",
author = "Andersen, {Jens E.T.} and M{\o}ller, {Preben J.}",
year = "1990",
month = "12",
day = "1",
doi = "10.1063/1.103223",
language = "English",
volume = "56",
pages = "1847--1849",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "19",

}

Impurity-induced 900 °C (2×2) surface reconstruction of SrTiO3(100). / Andersen, Jens E.T.; Møller, Preben J.

In: Applied Physics Letters, Vol. 56, No. 19, 01.12.1990, p. 1847-1849.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Impurity-induced 900 °C (2×2) surface reconstruction of SrTiO3(100)

AU - Andersen, Jens E.T.

AU - Møller, Preben J.

PY - 1990/12/1

Y1 - 1990/12/1

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.

UR - http://www.scopus.com/inward/record.url?scp=0000103239&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000103239&partnerID=8YFLogxK

U2 - 10.1063/1.103223

DO - 10.1063/1.103223

M3 - Article

VL - 56

SP - 1847

EP - 1849

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 19

ER -