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Paper detail

Entropy and specific heat of the infinite-dimensional three-orbital Hubbard model

The Hund coupling in multiorbital Hubbard systems induces spin freezing and associated Hund metal behavior. Using dynamical mean field theory, we explore the effect of local moment formation, spin and charge excitations on the entropy and specific heat of the three-orbital model. In particular, we demonstrate a substantial enhancement of the entropy in the spin-frozen metal phase at low temperatures, and peaks in the specific heat associated with the activation of spin and charge fluctuations at high temperature. We also clarify how these temperature scales depend on the interaction parameters and filling.

preprint2020arXivOpen access
Changming YuePhilipp Werner
cond-mat.str-elphysics.comp-ph
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Changming YuePhilipp Werner

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