J. T. Park

Phonons Reflect Dynamic Spin-State Order in LaCoO 3

We investigate lattice dynamics in LaCoO3 using inelastic neutron and x-ray scattering over T ¼ 2 − 650 K, spanning the spin-state crossover at T1 ≈ 100 K and the insulator-metal transition at T2 ≈ 550 K. Comparison with quasiharmonic ab initio lattice-dynamical calculations help...