2020/11/20 by Norimasa Sasabe, N. Sasabe, Motoi Kimata +3 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Magnetic circular dichroism #Magnetic field #Magnetic moment #Magnetization #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spectral line #Spin (aerodynamics) #Spins #Theoretical and Computational Physics #X-ray magnetic circular dichroism #cond-mat.str-el #physics.optics
paper · pdf · doi:10.1103/physrevlett.126.157402
published as Phys. Rev. Lett. 126, 157402 (2021) · 5 pages, 5 figures
arxiv created 2020/11/20 · openalex publication_date 2021/04/16 · arxiv updated 2021/04/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
X-ray magnetic circular dichroism (XMCD) is generally not observed for antiferromagnetic (AFM) states because XMCD signals from the antiparallelly coupled spins cancel each other. In this Letter, we theoretically show the presence of an XMCD signal from compensated two-dimensional triangle AFM structures on a Kagome lattice. The calculation reveals the complete correspondence between the XMCD spectra and the sign of the spin chirality: the XMCD signal only appears when the spin chirality is negative. This XMCD signal originates from the different absorption coefficients of the three sublattices reflecting different charge density anisotropies and directions of spin and orbital magnetic moments.