In situ optical characterization of LaAlO3 epitaxy on SrTiO3(001)

X. D. Zhu, Sebastian Wicklein, Felix Gunkel, Rui Xiao, Regina Dittmann

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3 Citations (Scopus)

Abstract

We followed the growth of LaAlO3 (LAO) on TiO2-terminated SrTiO3(001) in situ using a combination of a special monochromatic ellipsometry at photon energy of 1.96 eV and reflection high-energy electron diffraction (RHEED). We find that the phase of the ellipsometric ratio, defined as , changes linearly with the LAO film thickness. From the 4th unit cell (uc) up to the 11th unit cell, the slope of change in Δ is different from that for the initial three unit cells and yet there is no abrupt change in Δ when the LAO thickness increases from 3 uc to 4 uc. We explore structural and electronic processes in the LaAlO3-SrTiO3system that may be responsible for such an in situ observed optical response.

Original languageEnglish (US)
Article number37006
JournalEurophysics Letters
Volume109
Issue number3
DOIs
StatePublished - Feb 1 2015

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epitaxy
cells
high energy electrons
ellipsometry
film thickness
electron diffraction
slopes
photons
electronics
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Zhu, X. D., Wicklein, S., Gunkel, F., Xiao, R., & Dittmann, R. (2015). In situ optical characterization of LaAlO3 epitaxy on SrTiO3(001). Europhysics Letters, 109(3), [37006]. https://doi.org/10.1209/0295-5075/109/37006

In situ optical characterization of LaAlO3 epitaxy on SrTiO3(001). / Zhu, X. D.; Wicklein, Sebastian; Gunkel, Felix; Xiao, Rui; Dittmann, Regina.

In: Europhysics Letters, Vol. 109, No. 3, 37006, 01.02.2015.

Research output: Contribution to journalArticle

Zhu, XD, Wicklein, S, Gunkel, F, Xiao, R & Dittmann, R 2015, 'In situ optical characterization of LaAlO3 epitaxy on SrTiO3(001)', Europhysics Letters, vol. 109, no. 3, 37006. https://doi.org/10.1209/0295-5075/109/37006
Zhu, X. D. ; Wicklein, Sebastian ; Gunkel, Felix ; Xiao, Rui ; Dittmann, Regina. / In situ optical characterization of LaAlO3 epitaxy on SrTiO3(001). In: Europhysics Letters. 2015 ; Vol. 109, No. 3.
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