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  Soft-x-ray spectroscopy of monolayer transition metal dichalcogenides: valley selectivity?

Geondzhian, A., Rubio, A., & Altarelli, M. (2021). Soft-x-ray spectroscopy of monolayer transition metal dichalcogenides: valley selectivity?

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2111.15385.pdf (Preprint), 11MB
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https://arxiv.org/abs/2111.15385 (Preprint)
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 Creators:
Geondzhian, A.1, 2, Author
Rubio, A.1, 3, Author              
Altarelli, M.1, Author              
Affiliations:
1Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
2Max Planck POSTECH/KOREA Research Initiative, ou_persistent22              
3Center for Computational Quantum Physics (CCQ), The Flatiron Institute, ou_persistent22              

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Free keywords: Condensed Matter, cond-mat.other
 Abstract: Optical properties of semiconducting monolayer transition metal dichalcogenides have received a lot of attention in recent years, following the discovery of the valley selective optical population of either K+ or K valleys at the direct band gap, depending on the polarisation of the incoming light. We use group theoretical selection rules, as well as ab initio DFT calculations, to investigate whether this valence/conduction valley selectivity effect is also present in x-ray optical transitions from a core level of the metal atom to the valence and conduction band K valleys. Valley selectivity is predicted for s, p1/2 and p3/2 edges in transitions to and from the valence band edges with circularly polarised radiation. Possible novel applications to the diagnostics of valleytronic properties and intervalley dynamics are investigated and the feasibility of time-resolved pump-probe and high resolution experiments with suitable soft-x-ray free-electron laser sources is discussed.

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Language(s): eng - English
 Dates: 2021-11-30
 Publication Status: Published online
 Pages: 35
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: arXiv: 2111.15385
 Degree: -

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