Electronic structure of the high-Tc superconductor Sr0.2La1.8CuO4

Abstract

Employing ultraviolet and inverse photoemission spectroscopy to study ${\mathrm{Sr}}_{0.2}$ ${\mathrm{La}}_{1.8}$ ${\mathrm{CuO}}_4$, we have obtained a density-of-states type of picture of the electronic structure of this novel material which becomes superconducting below $T_c$=40 K. Our results compare favorably with recent band-structure calculations.