title: Coexistence of periodic modulation of quasiparticle states and superconductivity in Bi2Sr2CaCu2O8+delta.
abstract: In this article we show, using scanning tunneling spectroscopy, the existence of static striped density of electronic states in nearly optimally doped Bi2Sr2CaCu2O8+delta in zero field. This modulation is aligned with the Cu-O bonds, with a periodicity of four lattice constants, and exhibits features characteristic of a two-dimensional system of line objects. We further show that the density of states modulation manifests itself as a shift of states from above to below the superconducting gap. The fact that a single energy scale (i.e., the gap) appears for both superconductivity and stripes suggests that these two effects have the same origin.
authors.affiliation: Department of Physics, Stanford University, Stanford, CA 94305, USA.
authors.forename: C
authors.initials: C
authors.lastname: Howald
authors.forename: H
authors.initials: H
authors.lastname: Eisaki
authors.forename: N
authors.initials: N
authors.lastname: Kaneko
authors.forename: A
authors.initials: A
authors.lastname: Kapitulnik