Abstract:
In this report we demonstrate that high quality epitaxial heterostructures, based on metallic SrRuO3 and insulating SrTiO3 individual blocks a few unit cells thick, can be grown in a purely 2D, layer-by-layer mode, using pulsed laser deposition with in situ reflection high energy electron diffraction (RHEED) diagnostics. The thickness of each constituent block can be controlled at the level of a single unit cell. A detailed investigation carried out at the synchrotron facility, ESRF, by various X-ray techniques has demonstrated that each intensity oscillation of the RHEED specular spot corresponds strictly to the growth of a single perovskite unit cell, either SrRuO3 or SrTiO3. Furthermore, we show that, in these structures, the interfaces between the different constituent blocks are very sharp with a roughness of only one unit cell.
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Received 3 July 2002 / Received in final form 12 September 2002 Published online 31 October 2002
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Angeloni, M., Aruta, C., Balestrino, G. et al. SrRuO based heterostructures grown by pulsed laser deposition. Eur. Phys. J. B 29, 561–566 (2002). https://doi.org/10.1140/epjb/e2002-00340-5
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DOI: https://doi.org/10.1140/epjb/e2002-00340-5