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Séminaire MCBT

Mardi 10 novembre à 11h00,
Salle Louis Weil, E424

Orateur : Luca de’Medici [ESRF - Theory]
"Selective correlations and heavy-fermionic behaviour in Iron-based superconductors"

Abstract :

The matching between recent experimental evidences from various probes and realistic theoretical calculations highlights the coexistence, in the normal phase of Fe-based superconductors, of strongly correlated and weakly correlated electrons.
This peculiar situation that can be backtracked to the influence of Hund’s coupling exchange interaction between the conduction electrons in these materials, and can be controlled to some degree. In some of these compounds this differentiation can get quite extreme and gives rise to heavy-fermionic behaviour.
We will speculate that these and similar d-electron materials could constitute a new ballpark for the exploration of heavy-fermionic physics, and of its applications. A new application of the strong thermomagnetic properties that can in principle be found in heavy-fermions is proposed : self-cooling of high-current cables.

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