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  Local Berry curvature signatures in dichroic angle-resolved photoelectron spectroscopy

Schüler, M., de Giovannini, U., Hübener, H., Rubio, A., Sentef, M. A., & Werner, P. (2019). Local Berry curvature signatures in dichroic angle-resolved photoelectron spectroscopy.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-AFCB-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-AFD1-C
Genre: Paper

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1905.09404.pdf (Preprint), 6MB
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https://arxiv.org/abs/1905.09404 (Preprint)
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 Creators:
Schüler, M.1, 2, Author
de Giovannini, U.3, Author              
Hübener, H.3, Author              
Rubio, A.3, 4, Author              
Sentef, M. A.5, Author              
Werner, P.1, Author
Affiliations:
1Department of Physics, University of Fribourg, ou_persistent22              
2Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Laboratory, ou_persistent22              
3Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
4Center for Computational Quantum Physics (CCQ), The Flatiron Institute, ou_persistent22              
5Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              

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 Abstract: Topologically nontrivial two-dimensional materials hold great promise for next-generation optoelectronic applications. However, measuring the Hall or spin-Hall response is often a challenge and practically limited to the ground state. An experimental technique for tracing the topological character in a differential fashion would provide useful insights. In this work, we show that circular dichroism angle-resolved photoelectron spectroscopy (ARPES) provides a powerful tool which can resolve the topological and quantum-geometrical character in momentum space. In particular, we investigate how to map out the signatures of the local Berry curvature by exploiting its intimate connection to the orbital angular momentum. A spin-resolved detection of the photoelectrons allows to extend the approach to spin-Chern insulators. Our predictions are corroborated by state-of-the art ab initio simulations employing time-dependent density functional theory, complemented with model calculations. The present proposal can be extended to address topological properties in materials out of equilibrium in a time-resolved fashion.

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Language(s): eng - English
 Dates: 2019-05-22
 Publication Status: Published online
 Pages: 13
 Publishing info: -
 Table of Contents: -
 Rev. Method: No review
 Identifiers: arXiv: 1905.09404
 Degree: -

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