Condensed Matter Physics Seminar

Two Routes to Doping a Mott Insulator: Electron- vs Hole-Doped Cuprates

Prof. R.S. Markiewicz
Physics Department
Northeastern University
Tuesday, October 4, 2005
Higgins 235, 3pm

The striking effects of charge ordering ('stripes' or 'checkerboards') observed in hole doped cuprates appear to be absent, or much weaker in electron doped cuprates. Here I present a simple model for this asymmetry, and review detailed theoretical studies of both systems, attempting to reconcile results of a number of spectroscopies, including angle-resolved photoemission (ARPES), neutron scattering, scanning tunneling microscopy (STM), and resonant inelastic X-ray scattering (RIXS). The electron doped cuprates appear to be simple antiferromagnetic metals and superconductors, and could serve as a paradigm for understanding the physics of their more complicated hole doped counterparts.