Emerging 2D-ferromagnetism and strong spin-orbit coupling at the surface of 
valence-fluctuating EuIr2Si2

Schulz, Susanne; Nechaev, Ilya A.; Güttler, Monika; Poelchen, Georg; Generalov, Alexander; Danzenbächer, Steffen; Chikina, Alla; Seiro, Silvia; Kliemt, Kristin; Vyazovskaya, Alexandra Yu.; Kim, Timur K.; Dudin, Pavel; Chulkov, Evgueni V.; Laubschat, Clemens; Krasovskii, Eugene E.; Geibel, Christoph; Krellner, Cornelius; Kummer, Kurt; Vyalikh, Denis V.

doi:10.1038/s41535-019-0166-z

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Emerging 2D-ferromagnetism and strong spin-orbit coupling at the surface of valence-fluctuating EuIr₂Si₂

MPS-Authors

/persons/resource/persons126614

Geibel, Christoph
Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Schulz, S., Nechaev, I. A., Güttler, M., Poelchen, G., Generalov, A., Danzenbächer, S., et al. (2019). Emerging 2D-ferromagnetism and strong spin-orbit coupling at the surface of valence-fluctuating EuIr₂Si₂. npj Quantum Materials, 4(1): 26, pp. 1-8. doi:10.1038/s41535-019-0166-z.

Cite as: https://hdl.handle.net/21.11116/0000-0003-CED7-3

Abstract

The development of materials that are non-magnetic in the bulk but exhibit two-dimensional (2D) magnetism at the surface is at the core of spintronics applications. Here, we present the valence-fluctuating material EuIr2Si2, where in contrast to its non-magnetic bulk, the Si-terminated surface reveals controllable 2D ferromagnetism. Close to the surface the Eu ions prefer a magnetic divalent configuration and their large 4f moments order below 48 K. The emerging exchange interaction modifies the spin polarization of the 2D surface electrons originally induced by the strong Rashba effect. The temperature-dependent mixed valence of the bulk allows to tune the energy and momentum size of the projected band gaps to which the 2D electrons are confined. This gives an additional degree of freedom to handle spin-polarized electrons at the surface. Our findings disclose valence-fluctuating rare-earth based materials as a very promising basis for the development of systems with controllable 2D magnetic properties which is of interest both for fundamental science and applications. © 2019, The Author(s).