Revealing Hidden Orbital Pseudospin Texture with Time-Reversal Dichroism in 
Photoelectron Angular Distributions

Beaulieu, Samuel; Schusser, Jakub; Dong, Shuo; Schüler, M.; Pincelli, Tommaso; Dendzik, Maciej Ramon; Maklar, Julian; Neef, Alexander; Ebert, Hubert; Hricovini, Karol; Wolf, Martin; Braun, Jürgen; Rettig, Laurenz; Minár, Jan; Ernstorfer, Ralph

doi:10.1103/PhysRevLett.125.216404

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Revealing Hidden Orbital Pseudospin Texture with Time-Reversal Dichroism in Photoelectron Angular Distributions

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Beaulieu, Samuel
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Dong, Shuo
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons227631

Pincelli, Tommaso
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Dendzik, Maciej Ramon
Physical Chemistry, Fritz Haber Institute, Max Planck Society;
Department of Applied Physics, KTH Royal Institute of Technology;

/persons/resource/persons232536

Maklar, Julian
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons232532

Neef, Alexander
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22250

Wolf, Martin
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons104701

Rettig, Laurenz
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21497

Ernstorfer, Ralph
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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2006.01657V2.pdf
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PhysRevLett.125.216404.pdf
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Citation

Beaulieu, S., Schusser, J., Dong, S., Schüler, M., Pincelli, T., Dendzik, M. R., et al. (2020). Revealing Hidden Orbital Pseudospin Texture with Time-Reversal Dichroism in Photoelectron Angular Distributions. Physical Review Letters, 125(21): 216404. doi:10.1103/PhysRevLett.125.216404.

Cite as: https://hdl.handle.net/21.11116/0000-0006-8E16-2

Abstract

We performed angle-resolved photoemission spectroscopy (ARPES) of bulk
2H-WSe$_2$ for different crystal orientations linked to each other by
time-reversal symmetry. We introduce a new observable called time-reversal
dichroism, which quantifies the modulation of the photoemission intensity upon
effective time-reversal operation. We demonstrate that the hidden
orbital-texture of the crystal's electronic structure leaves its imprint onto
the time-reversal dichroism, due to multiple orbitals interference effects in
photoemission. Our experimental results are in quantitative agreement with
state-of-the-art fully relativistic calculations performed using the one-step
model of photoemission. While spin-resolved ARPES probes the spin component of
entangled spin-orbital texture in multiorbital systems, we demonstrate that
time-reversal dichroism is sensitive to its orbital-texture counterpart.