Derro D J, Hudson E W, Lang K M, Pan S H, Davis J C, Markert J T, de Lozanne A L
Department of Physics, University of Texas, Austin, TX 78712, USA.
Phys Rev Lett. 2002 Mar 4;88(9):097002. doi: 10.1103/PhysRevLett.88.097002. Epub 2002 Feb 14.
We present scanning tunneling spectroscopy measurements of the CuO chain plane in YBa(2)Cu(3)O(6+x), showing an approximately 25 meV gap in the local density of states (LDOS) filled by numerous intragap resonances: intense peaks in LDOS spectra associated with one-dimensional, Friedel-like oscillations. We discuss how these phenomena shed light on recent results from other probes, as well as their implications for phenomena in the superconducting CuO(2) plane.