Microstructure and Reconstruction of LaAlO3 {100} and {110} Surfaces

Abstract

Lathanum-aluminate (LaAlO3) is one of the optimum substrates for epitaxic growth of thin oxide films. In this paper, the structures of the {100} and {110} surfaces of annealed LaAlO3 are studied using reflection electron microscopy (REM). [010] and [001] steps have been observed on {100}, these are believed to be the lowest surface energy steps. The {100} surface is atomically flat, but the {110} surfaces exhibit high-density fine structures distributed on large surface terraces. These fine structures may correspond to the formation of small width (100) and (010) facets on the (110) surface. The 5×5 reconstruction is observed on {100}. No reconstruction is found on {110}.

This is a preview of subscription content, access via your institution.

References

  1. 1.

    Z.L. Wang, D.K. Christen, C.E. Klabunde, D.M. Kroeger, D.H. Lowndes and D.P. Norton, in Proc. of 52nd Annu, Meet, of Microscopy Soc. of America (San Francisco Press, 1994), G.W. Bailey and A.J. Garratt-Reed eds., pp. 790.

  2. 2.

    D.H. Lowndes, Z.L. Wang, D.K. Christen, C.E. Klabunde, D.M. Kroeger, and D.P. Norton, in preparation.

  3. 3.

    Z.L. Wang, Rep. Prog. Phys. 56, 997 (1993).

    CAS  Article  Google Scholar 

  4. 4.

    K. Yagi, Surf. Sci. Rep. 17, 305 (1993).

    CAS  Article  Google Scholar 

  5. 5.

    S. Geller and V.B. Bala, Acta Cryst. 9, 1019 (1956).

    CAS  Article  Google Scholar 

  6. 6.

    G.W. Berkstresser, A.J. Valentino and C.D. Brandie, J. Crystal Growth 109, 467 (1991).

    CAS  Article  Google Scholar 

  7. 7.

    Z.L. Wang and A.J. Shapiro, Surface Sci., submitted (1994).

    Google Scholar 

  8. 8.

    Thanks to Drs D. van Heerden and J. Weissmuller for detailed comments and discussion.

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Z. L. Wang.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Wang, Z.L., Shapiro, A.J. Microstructure and Reconstruction of LaAlO3 {100} and {110} Surfaces. MRS Online Proceedings Library 355, 175–180 (1994). https://doi.org/10.1557/PROC-355-175

Download citation