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Journal Article

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

MPS-Authors
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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;

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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;

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

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

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

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

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

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Fulltext (public)

2006.01657V2.pdf
(Preprint), 5MB

PhysRevLett.125.216404.pdf
(Publisher version), 3MB

Supplementary Material (public)
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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: http://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.