Visualizing Two Gaps in the High Temperature Superconductor Bi-2201

The relationship between the superconducting and pseudogap states in the cuprates has been a subject of much interest as well as debate in the HTS community. At the forefront of this debate is whether the pseudogap exists below Tc, and if it does, in what capacity. We present scanning tunneling microscopy measurements which provide evidence for two distinct but simultaneously coexisting gaps in the density of states of Bi2Sr2CuO6+x (Bi-2201) below Tc; one identified as the superconducting gap and the other, the pseudogap. In addition, we discuss our preliminary doping dependence measurements showing that the small (superconducting) gap scales with Tc while the larger (pseudogap) gap scales with T* indicating a consistency with their identification.