The Huygens Principle of Angle-Resolved Photoemission

Abstract

Angle-resolved photoemission spectroscopy (ARPES) measures the interference of dipole allowed Coulomb wavelets from the individual orbital emitters that contribute to an electronic band. If Coulomb scattering of the outgoing electron is neglected, this Huygens view of ARPES simplifies to a Fraunhofer diffraction experiment, and the relevant cross-sections to orbital Fouriertransforms. This plane wave approximation (PWA) is surprisingly descriptive of photoelectron distributions, but fails to reproduce kinetic energy dependent final state effects like dichroism. Yet, Huygens principle of ARPES can be easily adapted to allow for distortion and phase shift of the outgoing Coulomb wave. This retains the strong physical intuition and low computational cost of the PWA, but naturally captures momentum dependent interference effects in systems that so far required treatment at the ab initio level, such as linear dichroism in Rashba systems BiAg2 and AgTe.

References in corpus (3)

• Building Blocks of Topological Quantum Chemistry: Elementary Band Representations
• A first principles TDDFT framework for spin and time-resolved ARPES in periodic systems
• Design and realization of topological Dirac fermions on a triangular lattice

Cited by in corpus (6)

• Time- and Angle-Resolved Photoemission Studies of Quantum Materials
• Berry Curvature Signatures in Chiroptical Excitonic Transitions
• Scattering makes a difference in circular dichroic angle-resolved photoemission
• Reconstructing the wavefunction of magnetic topological insulators MnBi2Te4 and MnBi4Te7 using spin-resolved photoemission
• Reexamining Circular Dichroism in Photoemission From a Topological Insulator
• Circular dichroism in the photoelectron angular distribution of achiral molecules