Electron Spectroscopy: ARPES

Angle-resolved photoemission spectroscopy (ARPES) is a powerful technique that can directly probe the electronic structure of materials in the momentum space. With ultra-high energy and momentum resolutions, ARPES can help to understand how materials behave. Especially, for high-T C superconductors, the experimental results from ARPES, including the Fermi surface, band dispersion, energy kink, superconducting gap distribution, etc., serve as solid foundations for our understanding on the superconductivity.