Chirality-inverted Dzyaloshinskii-Moriya interaction

0576776 - FZÚ 2024 RIV US eng J - Journal Article
Zakeri, Kh. - Marmodoro, Alberto - von Faber, A. - Mankovsky, S. - Ebert, H.
Chirality-inverted Dzyaloshinskii-Moriya interaction.
Physical Review B. Roč. 108, č. 10 (2023), č. článku L100403. ISSN 2469-9950. E-ISSN 2469-9969
R&D Projects: GA ČR(CZ) GA23-04746S
Institutional support: RVO:68378271
Keywords : Dzyaloshinskii-Moriya interaction Chiral magnets * chirality-inverted DMI
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.7, year: 2022
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevB.108.L100403

The Dzyaloshinskii-Moriya interaction (DMI) is an antisymmetric exchange interaction, which is responsible for the formation of topologically protected spin textures in chiral magnets. Here, by measuring the dispersion relation of the DM energy, we quantify the atomistic DMI in a model system, i.e., a Co double layer on Ir(001). We unambiguously demonstrate the presence of a chirality-inverted DMI, i.e., a sign change in the chirality index of DMI from negative to positive, when comparing the interaction between nearest neighbors to that between neighbors located at longer distances. The effect is in analogy to the change in the character of the Heisenberg exchange interaction from, e.g., ferromagnetic to antiferromagnetic.
Permanent Link: https://hdl.handle.net/11104/0346190