  Recently we have used spectroscopic mapping with the scanning tunneling
microscope to probe modulations of the electronic density of states in single
crystals of the high temperature superconductor Bi2Sr2CaCu2O8+d (Bi-2212) as a
function of temperature [C. V. Parker et al., Nature (London) 468, 677 (2010)].
These measurements showed Cu-O bond-oriented modulations that form below the
pseudogap temperature with a temperature-dependent energy dispersion displaying
different behaviors in the superconducting and pseudogap states. Here we
demonstrate that quasiparticle scattering off impurities does not capture the
experimentally observed energy- and temperature-dependence of these
modulations. Instead, a model of scattering of quasiparticles from short-range
stripe order, with periodicity near four lattice constants (4a), reproduces the
experimentally observed energy dispersion of the bond-oriented modulations and
its temperature dependence across the superconducting critical temperature, Tc.
The present study confirms the existence of short-range stripe order in
Bi-2212.
