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cond-mat.mtrl-sci2026
Incipient magnetic instability in RuO with random phase approximation
Diana Csontosová, Kyo-Hoon Ahn, Jan Kuneš
We study the instability in RuO using the Hartree-Fock approximation followed by the random phase approximation. We employ a three-orbital Hubbard model without spin-orbit coup…
cond-mat.mtrl-sci2025
On the Néel Vector Dependence of X-ray Magnetic Circular Dichroism in Altermagnets
Jan Kuneš
Dependence of x-ray magnetic circular dichroism on the experimental geometry is described by a frequency-dependent Hall vector. Using group theory, we derive a general relationship…
cond-mat.mtrl-sci2025
Theory of circular dichroism in resonant inelastic x-ray scattering
M. Furo, A. Hariki, J. Kuneš
We analyze circular dichroism (CD) in resonant inelastic x-ray scattering (RIXS) in magnetic materials. We define RIXS-CD as the difference between scattering amplitudes for the ri…