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O: Fachverband Oberflächenphysik

O 73: Mini-Symposium: Dzyaloshinskii-Moriya Interaction (DMI) in magnetic layered systems II

O 73.1: Hauptvortrag

Mittwoch, 3. März 2021, 13:30–14:00, R3

Theoretical insights into Dzyaloshinskii-Moriya interaction in nanostructures based on transition metals, oxides and 2D materials — •Mairbek Chshiev — Univ. Grenoble Alpes, CNRS, CEA, Spintec, Grenoble, France

Spin-orbit coupling (SOC) based phenomena at interfaces comprising ferromagnetic (FM) and nonmagnetic (NM) metals, oxides (O) and/or 2D materials have been of major interest [1,2]. Here we elucidate microscopic mechanisms of Dzyaloshinskii-Moriya interaction at FM/NM [3,4], FM/O [4,5] and FM/2D [6,7] interfaces. In particular, we show that while the DMI at FM/NM interfaces is governed by Fert-Levy model [3], in case of FM/O or FM/graphene interfaces the DMI is mainly due to Rashba SOC [4,6]. In addition, several approaches for DMI enhancement are presented [4] that allowed observation of room temperature skyrmions [5]. Possibility of controlling DMI by voltage (VCDMI) at NM/FM/O [4,8] or by hydrogenation at FM/graphene interfaces [7] are discussed as well. Finally, DMI mechanisms and potential of realizing skyrmion states in 2D magnets are discussed [9,10].

[1] B. Dieny and M. Chshiev, Rev. Mod. Phys. 89, 025008 (2017); [2] S. Roche et al, 2D Materials 2, 030202 (2015); [3] H. X. Yang et al, Phys. Rev. Lett. 115, 267210 (2015); [4] H. X. Yang et al, Sci. Rep. 8, 12356 (2018); [5] O. Boulle et al, Nat. Nanotech. 11, 449 (2016); [6] H. X. Yang et al, Nat. Mater. 17, 605 (2018); [7] B. Yang et al, Phys. Rev. B 101, 014406 (2020); [8] T. Srivastava et al, Nano Lett. 18, 4871 (2018) [9] J. Liang et al, Phys. Rev. B 101, 184401 (2020); [10] T.-E. Park et al, arXiv:1907.01425.