Angle-resolved photo-emission results for single crystals were reported. In addition to 3 Fermi surfaces which were consistent with band theory and de Haas-van Alphen results, a fourth band was found which was caused by band folding along the (π,π) direction. This band folding was thought to be caused by reconstruction.

Band Reflection and Surface Reconstruction in Sr2RuO4. H.Ding, S.C.Wang, H.B.Yang, T.Takahashi, J.C.Campuzano, Y.Maeno: Physica C, 2001, 364-365, 594-9