About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Solid State Communications
Paper
Topography and local conductance images of YBa2Cu3O7 crystals fractured in ultra high vacuum
Abstract
Atomic-scale topography and local dynamic conductance images of polycrystalline YBa2Cu3O7 samples fractured in ultra high vacuum are obtained with a cross-sectional scanning tunneling microscope. Topographic features are found which consist of strips with a 12 Å periodicity. Simultaneous measurements of normalized conductance (d In I/dV) on these surfaces exhibit a sharp contrast from strip to strip. The corresponding tunneling spectra at these areas show an alternation of metallic and semiconducting characteristics. Possible implication of the results on the basic understanding of high temperature superconductivity is discussed. © 1989.