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This content will become publicly available on September 1, 2022

Differentiating Hund from Mott physics in a three-band Hubbard-Hund model: Temperature dependence of spectral, transport, and thermodynamic properties
Authors:
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Award ID(s):
Publication Date:
NSF-PAR ID:
10309168
Journal Name:
Physical Review B
Volume:
104
Issue:
11
ISSN:
2469-9950
Sponsoring Org:
National Science Foundation
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1. Abstract

The physics of weak itinerant ferromagnets is challenging due to their small magnetic moments and the ambiguous role of local interactions governing their electronic properties, many of which violate Fermi-liquid theory. While magnetic fluctuations play an important role in the materials’ unusual electronic states, the nature of these fluctuations and the paradigms through which they arise remain debated. Here we use inelastic neutron scattering to study magnetic fluctuations in the canonical weak itinerant ferromagnet MnSi. Data reveal that short-wavelength magnons continue to propagate until a mode crossing predicted for strongly interacting quasiparticles is reached, and the local susceptibility peaksmore »