SUMMARY
Surface structures of the high‐Tc superconductors YBa2Cu3O7‐x, BiCa1·7Sr0·7Cu2Ox and TlCaBaCuO4·5±x have been investigated with scanning tunnelling microscopy. The observed features include well‐organized stripe corrugations in Y‐Ba‐Cu‐O as well as orientated flake‐like structures and steps with various heights in the Bi‐ and Tl‐compounds. These observations suggest strong local variations of the elastic and electronic properties of the investigated materials.
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