Preprint

PUBDB-2024-06136

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Towards Robust Dichroism in Angle-Resolved Photoemission

Schusser, J. (Corresponding author)Extern* ; Orio, H.Extern* ; Ünzelmann, M. ; Heßdörfer, J.Extern* ; Masilamani, M. ; Diekmann, F.Extern* ; Rossnagel, K.DESY* ; Reinert, F.Extern*

2024

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Please use a persistent id in citations: doi:10.21203/rs.3.rs-3758849/v1  doi:10.3204/PUBDB-2024-06136

Abstract: Dichroic techniques are highly relevant in the field of topological materials, layered systems, and spin-polarized electronic states. Dichroism in angle-resolved photoemission is per se a matrix element effect, which depends on the initial and final states as well as on the perturbation by the light field. Although matrix element effects in ARPES such as dichroism are important for addressing properties of the initial state wave functions, the results can strongly depend on experimental geometry or final state effects. Combining experimental data on bulk WSe2 taken at soft x-ray photon energies with state-of-the-art photoemission calculations, we demonstrate that a dichroic observable called time-reversal dichroism remains unaffected against variation of photon energy, light polarization, and the angle of incidence. The robustness of this matrix element effect indicates a considerable benefit over other dichroic techniques and encourages further experimental and theoretical investigations.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. FS-SXQM (FS-SXQM)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. DFG project G:(GEPRIS)390858490 - EXC 2147: Komplexität und Topologie in Quantenmaterialien (CT.QMAT) (390858490) (390858490)
4. DFG project G:(GEPRIS)258499086 - SFB 1170: Topologische und korrelierte Elektronik in Ober- und Grenzflächen ("ToCoTronics") (258499086) (258499086)

Experiment(s):

1. PETRA Beamline P04 (PETRA III)

Appears in the scientific report 2024

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