Preparation of atomically flat SrTiO3 surfaces using a deionized-water leaching and thermal annealing procedure

J. G. Connell; B. J. Isaac; G. B. Ekanayake; D. R. Strachan; S. S.A. Seo

doi:10.1063/1.4773052

Preparation of atomically flat SrTiO₃ surfaces using a deionized-water leaching and thermal annealing procedure

J. G. Connell
, B. J. Isaac
, G. B. Ekanayake
, D. R. Strachan
, S. S.A. Seo

Producción científica: Article › revisión exhaustiva

125 Citas (Scopus)

Resumen

We report that a deionized water leaching and thermal annealing technique can be effective for preparing atomically flat and singly terminated surfaces of single crystalline SrTiO₃ substrates. After a two-step thermal-annealing and deionized-water leaching procedure, topography measured by atomic force microscopy shows the evolution of substrates from a rough to step-terraced surface structure. Lateral force microscopy confirms that the atomically flat surfaces are singly terminated. Moreover, this technique can be used to remove excessive strontium oxide or hydroxide composites segregated on the SrTiO₃ surface. This acid-etchant-free technique facilitates the preparation of atomically aligned SrTiO₃ substrates, which promotes studies on two-dimensional physics of complex oxide interfaces.

Idioma original	English
Número de artículo	251607
Publicación	Applied Physics Letters
Volumen	101
N.º	25
DOI	https://doi.org/10.1063/1.4773052
Estado	Published - dic 17 2012

Nota bibliográfica

Funding Information:
The authors thank G. W. J. Hassink, T. Qi, and D. Y. Kim for useful discussions, comments, and experimental help. This research was supported in part by the NSF through Grant No. EPS-0814194, the Center for Advanced Materials, a grant from the Kentucky Science and Engineering Foundation as per Grant Agreement No. KSEF-148-502-12-303 with the Kentucky Science and Technology Corporation, and a Research Support Grant from the University of Kentucky Office of the Vice President for Research.

Financiación

The authors thank G. W. J. Hassink, T. Qi, and D. Y. Kim for useful discussions, comments, and experimental help. This research was supported in part by the NSF through Grant No. EPS-0814194, the Center for Advanced Materials, a grant from the Kentucky Science and Engineering Foundation as per Grant Agreement No. KSEF-148-502-12-303 with the Kentucky Science and Technology Corporation, and a Research Support Grant from the University of Kentucky Office of the Vice President for Research.

Financiadores	Número del financiador
Center for Advanced Molecular Materials
Kentucky Science and Technology Corporation
National Science Foundation (NSF)	EPS-0814194
Office of the Executive Vice President for Research and Partnerships, Purdue University
Kentucky Science and Engineering Foundation	KSEF-148-502-12-303

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4773052

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title = "Preparation of atomically flat SrTiO3 surfaces using a deionized-water leaching and thermal annealing procedure",

abstract = "We report that a deionized water leaching and thermal annealing technique can be effective for preparing atomically flat and singly terminated surfaces of single crystalline SrTiO3 substrates. After a two-step thermal-annealing and deionized-water leaching procedure, topography measured by atomic force microscopy shows the evolution of substrates from a rough to step-terraced surface structure. Lateral force microscopy confirms that the atomically flat surfaces are singly terminated. Moreover, this technique can be used to remove excessive strontium oxide or hydroxide composites segregated on the SrTiO3 surface. This acid-etchant-free technique facilitates the preparation of atomically aligned SrTiO3 substrates, which promotes studies on two-dimensional physics of complex oxide interfaces.",

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AU - Strachan, D. R.

AU - Seo, S. S.A.

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N2 - We report that a deionized water leaching and thermal annealing technique can be effective for preparing atomically flat and singly terminated surfaces of single crystalline SrTiO3 substrates. After a two-step thermal-annealing and deionized-water leaching procedure, topography measured by atomic force microscopy shows the evolution of substrates from a rough to step-terraced surface structure. Lateral force microscopy confirms that the atomically flat surfaces are singly terminated. Moreover, this technique can be used to remove excessive strontium oxide or hydroxide composites segregated on the SrTiO3 surface. This acid-etchant-free technique facilitates the preparation of atomically aligned SrTiO3 substrates, which promotes studies on two-dimensional physics of complex oxide interfaces.

AB - We report that a deionized water leaching and thermal annealing technique can be effective for preparing atomically flat and singly terminated surfaces of single crystalline SrTiO3 substrates. After a two-step thermal-annealing and deionized-water leaching procedure, topography measured by atomic force microscopy shows the evolution of substrates from a rough to step-terraced surface structure. Lateral force microscopy confirms that the atomically flat surfaces are singly terminated. Moreover, this technique can be used to remove excessive strontium oxide or hydroxide composites segregated on the SrTiO3 surface. This acid-etchant-free technique facilitates the preparation of atomically aligned SrTiO3 substrates, which promotes studies on two-dimensional physics of complex oxide interfaces.

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