Inelastic neutron scattering validate the ab initio theory of the crossover from incoherent to coherent electronic excitations as a function of temperature.
Significance and Impact
This coherence crossover is fundamental to many strongly correlated electron systems and is now comprehensively understood using the latest advances in experiment and theory.
- Neutron scattering measurements of full volumes of 4D S(Q,ω) were performed on Angular-Range Chopper Spectrometer (SNS) and Merlin (ISIS).
- There is excellent agreement on an absolute intensity scale between measurements and ab initio calculations.
- The magnetic response is modulated by the joint density-of-states of f-electron quasiparticles, strongly enhanced by local particle-hole interactions.
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