title: Coincidence of checkerboard charge order and antinodal state decoherence in strongly underdoped superconducting Bi2Sr2CaCu2O8 + delta).
abstract: The doping dependence of nanoscale electronic structure in superconducting Bi(2)Sr(2)CaCu(2)O(8 + delta) is studied by scanning tunneling microscopy. At all dopings, the low energy density-of-states modulations are analyzed according to a simple model of quasiparticle interference and found to be consistent with Fermi-arc superconductivity. The superconducting coherence peaks, ubiquitous in near-optimal tunneling spectra, are destroyed with strong underdoping and a new spectral type appears. Exclusively in regions exhibiting this new spectrum, we find local "checkerboard" charge ordering of high energy states, with a wave vector of Q = (+/- 2pi/4.5a(0),0); (0, +/- 2pi/4.5a(0)) +/- 15%. Surprisingly, this spatial ordering of high energy states coexists harmoniously with the low energy Bogoliubov quasiparticle states.
authors.affiliation: Physics Department, University of California, Berkeley, 94720, USA.
authors.forename: K
authors.initials: K
authors.lastname: McElroy
authors.forename: D-H
authors.initials: DH
authors.lastname: Lee
authors.forename: J E
authors.initials: JE
authors.lastname: Hoffman
authors.forename: K M
authors.initials: KM
authors.lastname: Lang
authors.forename: J
authors.initials: J
authors.lastname: Lee
authors.forename: E W
authors.initials: EW
authors.lastname: Hudson
authors.forename: H
authors.initials: H
authors.lastname: Eisaki
authors.forename: S
authors.initials: S
authors.lastname: Uchida
authors.forename: J C
authors.initials: JC
authors.lastname: Davis