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Updated: Sep 11, 2025

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Lippmann-Schwinger Approach for Accurate Photoelectron Wave Functions and Angle-Resolved Photoemission Spectra from
Ji Hoon Ryoo1, Cheol-Hwan Park1
1Seoul National University, Seoul National University, Department of Physics and Astronomy, Seoul 08826, Korea and Center for Theoretical Physics, Seoul 08826, Korea.
Abstract:
We present a conceptually simple and technically straightforward method for calculating photoelectron wave functions that is easily integrable with standard wave-function-based density-functional-theory packages. Our method is based on the Lippmann-Schwinger equation, naturally incorporating the boundary condition that the final photoelectron state must satisfy. The calculated results are in good agreement with the measured photon-energy and polarization dependence of the angle-resolved photoemission spectroscopy (ARPES) of graphene, the photon-energy-dependent evolution of the so-called dark corridor arising from the pseudospin, and WSe_{2}, the circular dichroism reflecting the hidden orbital polarization. Our Letter opens doors to do-it-yourself simulations of ARPES with standard density-functional-theory packages, of crucial importance in the era of "quantum materials," whose key experimental tool is ARPES.
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