Scanning Tunneling Spectroscopy of Bi$_{2}$Sr$_{2}$CuO$_{6+x}$

Scanning tunneling microscopy has revealed many interesting spectral features of the high temperature superconductors, including the nature of atomic scale defects like single atom impurities and magnetic vortices and the existence of inhomogeneity. Most of these studies have focused on the bilayer compound Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+x}$ (Bi-2212). Here we present scanning tunneling microscopy results from its single layer relative, Bi$_{2}$Sr$_{2}$CuO$_{6+x}$ (Bi-2201), comparing and contrasting these measurements with previously reported results from Bi-2212.