Abstract
Angle-resolved photoemission measurements have been performed on a commensurate system [Bi2Ba2O4]0.50CoO2 with various photon energies. The results show that the Bloch waves propagate through the interface between CoO2 and Bi2Ba2O4 structures, contrasting with a previous study in an incommensurate system [Bi2Sr2O4]0.51CoO2. On the other hand, transmission electron microscopy (TEM) measurements indicate that there is a non-negligible amount of scattering between the adjacent substructures. We present a detailed comparison of TEM images for three different misfit compounds. The results demonstrate that the self-organization at the atomic level enables to stabilize the misfit structure and modifies the electronic states in those systems.
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