PHOTOEMISSION

In the last two decades, angle-resolved photoemission spectroscopy (ARPES) has emerged as the most powerful tool for determining the momentum-resolved electronic structure of solids. This success story has largely been due to the construction of new sources for synchrotron radiation as well as due to the extreme progess in the field of spectrometer design. Today, modern photoelectron spectrometers not only provide very high energy and momentum resolution at a single electron emission angle, but also facilitate a full hemisphere mapping of the electron distribution in momentum space... Here we present our recently developed photoelectron spectrometer ASPHERE (Angular Spectrometer for Photoelectrons with High Energy RE solution), which has proven to be a very versatile instrument for high-resolution ARPES work. ASPHERE is now part of our experimental end station at the HONORMI beamline (see Fig.1) at the Hamburger Synchronstrahlungslabor, but the entire experimental setup is also..