Exchange Splitting of a Hybrid Surface State and Ferromagnetic Order in a 2D Surface Alloy

6533b830fe1ef96bd1297b45

RESEARCH PRODUCT

Exchange Splitting of a Hybrid Surface State and Ferromagnetic Order in a 2D Surface Alloy

J. Seidel P. M. Buhl S. Mousavion B. Dupé E. S. Walther K. Medjanik D. Vasilyev S. Babenkov M. Ellguth M. Maniraj J. Sinova G. Schönhense H. -J. Elmers M. Aeschlimann B. Stadtmüller

subject

Physics::Fluid Dynamics Condensed Matter - Mesoscale and Nanoscale Physics Mesoscale and Nanoscale Physics (cond-mat.mes-hall)FOS: Physical sciences Condensed Matter::Strongly Correlated Electrons

description

Surface alloys are highly flexible materials for tailoring the spin-dependent properties of surfaces. Here, we study the spin-dependent band structure of a DyAg$_2$ surface alloy formed on an Ag(111) crystal. We find a significant exchange spin-splitting of the localized Dy 4f states pointing to a ferromagnetic coupling between the localized Dy moments at $40\,$K. The magnetic coupling between these moments is mediated by an indirect, RKKY-like exchange coupling via the spin-polarized electrons of the hole-like Dy-Ag hybrid surface state.

year	journal	country	edition	language
2019-06-09

https://dx.doi.org/10.48550/arxiv.1906.03780

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