Electronic properties of disordered valence-bond stripes in cuprate superconductors

We calculate single-particle properties of short-range-ordered stripe states using Monte Carlo simulations of collective charge-density wave (CDW) order parameters coupled to fermions on a 2d square lattice. For superconducting bond-centered stripes with a d-wave form factor, we find a valence-bond glass which coexists with low-energy quasiparticles featuring interference phenomena, in agreement with recent scanning tunneling microscopy (STM) measurements on underdoped Bi2Sr2CaCu2O8+delta and Ca2-xNaxCuO2Cl2. Together with earlier work, our calculations provide a link between CDW signatures seen in STM and those in magnetic neutron scattering.