title: A brief update of angle-resolved photoemission spectroscopy on a correlated electron system.
abstract: In this paper, we briefly summarize the capabilities of state-of-the-art angle-resolved photoemission spectroscopy (ARPES) in the field of experimental condensed matter physics. Due to the advancement of the detector technology and the high flux light sources, ARPES has become a powerful tool to study the low energy excitations of solids, especially those novel quantum materials in which many-body physics are at play. To benchmark today's state-of-the-art ARPES technique, we demonstrate that the precision of today's ARPES has advanced to a regime comparable to the bulk-sensitive de Haas-van Alphen (dHvA) measurements. Finally, as an example of new discoveries driven by the advancement of the ARPES technique, we summarize some of our recent ARPES measurements on underdoped high-T(c) superconducting cuprates, which have provided further insight into the complex pseudogap problem.
authors.affiliation: Department of Physics, Applied Physics, and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305, USA.
authors.forename: W S
authors.initials: WS
authors.lastname: Lee
authors.forename: I M
authors.initials: IM
authors.lastname: Vishik
authors.forename: D H
authors.initials: DH
authors.lastname: Lu
authors.forename: Z-X
authors.initials: ZX
authors.lastname: Shen