Elmers H J, Chernov S V, D'Souza S W, Bommanaboyena S P, Bodnar S Yu, Medjanik K, Babenkov S, Fedchenko O, Vasilyev D, Agustsson S Y, Schlueter C, Gloskovskii A, Matveyev Yu, Strocov V N, Skourski Y, Šmejkal L, Sinova J, Minár J, Kläui M, Schönhense G, Jourdan M
Institut für Physik, Johannes Gutenberg-Universität, Staudingerweg 7, D-55099 Mainz, Germany.
New Technologies-Research Centre, University of West Bohemia, Univerzitni 8, 306 14 Pilsen, Czech Republic.
ACS Nano. 2020 Dec 22;14(12):17554-17564. doi: 10.1021/acsnano.0c08215. Epub 2020 Nov 25.
The coupling of real and momentum space is utilized to tailor electronic properties of the collinear metallic antiferromagnet MnAu by aligning the real space Néel vector indicating the direction of the staggered magnetization. Pulsed magnetic fields of 60 T were used to orient the sublattice magnetizations of capped epitaxial MnAu(001) thin films perpendicular to the applied field direction by a spin-flop transition. The electronic structure and its corresponding changes were investigated by angular-resolved photoemission spectroscopy with photon energies in the vacuum-ultraviolet, soft, and hard X-ray range. The results reveal an energetic rearrangement of conduction electrons propagating perpendicular to the Néel vector. They confirm previous predictions on the origin of the Néel spin-orbit torque and anisotropic magnetoresistance in MnAu and reflect the combined antiferromagnetic and spin-orbit interaction in this compound leading to inversion symmetry breaking.
通过对齐表示交错磁化方向的实空间奈尔矢量，利用实空间和动量空间的耦合来定制共线金属反铁磁体MnAu的电子特性。使用60 T的脉冲磁场，通过自旋翻转转变使覆盖的外延MnAu(001)薄膜的亚晶格磁化方向垂直于外加磁场方向。利用真空紫外、软X射线和硬X射线范围内的光子能量，通过角分辨光电子能谱研究了电子结构及其相应变化。结果揭示了垂直于奈尔矢量传播的传导电子的能量重排。它们证实了先前关于MnAu中奈尔自旋轨道转矩和各向异性磁阻起源的预测，并反映了该化合物中反铁磁和自旋轨道相互作用的结合导致了反演对称性破缺。
