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  Insight into the temperature evolution of electronic structure and mechanism of exchange interaction in EuS

Fedorov V, A., Poelchen, G., Eremeev V, S., Schulz, S., Generalov, A., Polley, C., et al. (2021). Insight into the temperature evolution of electronic structure and mechanism of exchange interaction in EuS. The Journal of Physical Chemistry Letters, 12(34), 8328-8334. doi:10.1021/acs.jpclett.1c02274.

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acs.jpclett.1c02274.pdf (Publisher version), 4MB
 
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https://doi.org/10.1021/acs.jpclett.1c02274 (Publisher version)
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 Creators:
Fedorov V, A.1, Author
Poelchen, G.1, Author
Eremeev V, S.1, Author
Schulz, S.1, Author
Generalov, A.1, Author
Polley, C.1, Author
Laubschat, C.1, Author
Kliemt, K.1, Author
Kaya, N.1, Author
Krellner, C.1, Author
Chulkov V, E.1, Author
Kummer, K.1, Author
Usachov, D. Yu1, Author
Ernst, Arthur2, Author              
Vyalikh, D. V.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Max Planck Institute of Microstructure Physics, Max Planck Society, ou_2415691              

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Free keywords: PLANE-WAVE; TRANSPORT-PROPERTIES; GROWTH; PHASE; COHPChemistry; Science & Technology - Other Topics; Materials Science; Physics;
 Abstract: Discovered in 1962, the divalent ferromagnetic semiconductor EuS (TC = 16.5 K, Eg = 1.65 eV) has remained constantly relevant to the engineering of novel magnetically active interfaces, heterostructures, and multilayer sequences and to combination with topological materials. Because detailed information on the electronic structure of EuS and, in particular, its evolution across TC is not well-represented in the literature but is essential for the development of new functional systems, the present work aims at filling this gap. Our angle-resolved photoemission measurements complemented with first-principles calculations demonstrate how the electronic structure of EuS evolves across a paramagnetic-ferromagnetic transition. Our results emphasize the importance of the strong Eu 4f-S 3p mixing for exchange-magnetic splittings of the sulfur-derived bands as well as coupling between f and d orbitals of neighboring Eu atoms to derive the value of TC accurately. The 4f-3p mixing facilitates the coupling between 4f and 5d orbitals of neighboring Eu atoms, which mainly governs the exchange interaction in EuS.

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Language(s): eng - English
 Dates: 2021-08-242021-09-02
 Publication Status: Published in print
 Pages: 7
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Title: The Journal of Physical Chemistry Letters
  Abbreviation : J. Phys. Chem. Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 12 (34) Sequence Number: - Start / End Page: 8328 - 8334 Identifier: ISSN: 1948-7185
CoNE: https://pure.mpg.de/cone/journals/resource/1948-7185