Doping evolution of the cuprate superconductors from high-resolution ARPES

Abstract

Recent advances in both materials synthesis and state-of-the-art instrumentation have led to an understanding of how the electronic structure of the high temperature cuprate superconductors first evolve away from the parent Mott insulating state. In this chapter, we describe ARPES studies of the La2-xSrx CuO4 and Ca2-xNaxCuO2 Cl2 compounds which track the growth of the nodal quasiparticles, and the doping evolution of the chemical potential and Fermi surface. These results indicate that the consideration of strong electron-boson interactions are essential for an adequate description of the first doped hole states, and also suggest a relationship between the momentum anisotropy of the low-energy states and competing orders in the underdoped regime. © 2007 Springer.