Angle-resolved photoemission

Abstract

Angle-resolved photoemission is one of the key probes of the electronic structure and associated dynamics of condensed matter systems. With the development of new technologies the technique has undergone a renaissance in the last two decades. Modern spectrometers now allow multiplexing in energy and momentum and this has resulted in dramatic improvements in the corresponding resolutions. With these increased resolutions it has become possible to examine in detail the effects of interactions with collective excitations, including phonons, spin excitations and charge density waves. The addition of spin detection enables studies of magnetic phenomena in surfaces and thin films. New developments in light sources, including both lab-based and accelerator based lasers, are allowing pump-probe experiments with photoemission being used to probe the time evolution of systems that have been pumped into non-equilibrium states.