We have investigated the (0001) surfaces of several hexagonal manganite perovskites by low-energy electron diffraction (LEED) in order to determine if the surface periodicity is different from that of the bulk materials. These LEED studies were conducted using near-normal incidence geometry with a low energy electron microscope (LEEM)/LEED apparatus from room temperature to 1200 degrees Celsius and with an electron energy in the range of 15-50 eV. Diffraction patterns showed features of bulk-terminated periodicity as well as a 2\times2 surface reconstruction. Possible origins for this surface reconstruction structure are discussed and comparisons are made with surface studies of other complex oxides.
@article{arxiv.0912.3177,
title = {Surface Reconstruction of Hexagonal Y-doped HoMnO3 and LuMnO3 studied using low-energy electron diffraction},
author = {R. Vasic and J. T. Sadowski and Y. J. Choi and H. D. Zhou and C. R. Wiebe and S. W. Cheong and J. E. Rowe and M. D. Ulrich},
journal= {arXiv preprint arXiv:0912.3177},
year = {2013}
}