Figure 6.

Magnetic excitations

(A) Temperature-dependent ¹T₁⁻¹ of Nd_0.85Sr_0.15NiO₂ under different magnetic fields.

(B) Temperature-dependent ¹T₁⁻¹ is plotted in a log-log scale, with a fitting of low-temperature data to ¹T₁⁻¹ ∝ T². Adapted from Cui et al.¹⁴⁶

(C) Dispersion of magnetic excitations in NdNiO₂ and fitted to the linear spin wave theory. Magnetic mode energy ε is denoted by filled red circles and damping factor γ is denoted by empty red circles versus projected in-plane momentum transfers q_// along high-symmetry directions. Adapted from Lu et al.¹⁵¹