Electric-field control of the exchange interactions

0549415 - FZÚ 2022 RIV US eng J - Journal Article
Mankovsky, S. - Simon, E. - Polesya, S. - Marmodoro, Alberto - Ebert, H.
Electric-field control of the exchange interactions.
Physical Review B. Roč. 104, č. 17 (2021), č. článku 174443. ISSN 2469-9950. E-ISSN 2469-9969
Institutional support: RVO:68378271
Keywords : spintronics * non-equilibrium * electric field * ab-initio * Heisenberg exchange interactions * KKR * DFT * magnetic thin film * gating
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.908, year: 2021
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevB.104.174443

The impact of an applied electric field on the exchange coupling parameters has been investigated based on first-principles electronic structure calculations by means of the KKR Green function method. The calculations have been performed for a Fe film, free-standing and deposited on two different substrates, having 1 monolayer (ML) thickness to minimize the effect of screening of the electric field typical for metallic systems. By comparing the results for the free-standing Fe ML with those for Fe on the various substrates, we could analyse the origin of the field-induced change of the exchange interactions. Compared to the free-standing Fe ML, in particular rather pronounced changes have been found for the Fe/Pt(111) system due to the localized electronic states at the Fe/Pt interface, which are strongly affected by the electric field and which play an important role for the Fe-Fe exchange interactions.
Permanent Link: http://hdl.handle.net/11104/0325450