Photoemission Electron Spectroscopy IV: Angle-resolved photoemission spectroscopy

Abstract

The angle-resolved photoemission spectroscopy (ARPES) is a powerful experimental tool to probe the momentum-resolved electronic structure, i.e., the electronic band dispersion ε(k), of solids and their surfaces. ARPES is also an ideal tool to address the question concerning the electron correlation effect on qua-siparticle excitations in the low-dimensional (one-or two-dimensional) correlated electron systems. In this issue, we briefly introduce representative studies of ARPES and their fruitfulness from the free-electron-like three-dimensional systems to the low-dimensional strongly correlated electron systems.