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DTSTART;TZID=Europe/Paris:20230511T110000
DTEND;TZID=Europe/Paris:20230511T120000
DTSTAMP:20230504T085200
UID:MEC-30da227c6b5b9e2482b6b221c711edfd@lps.u-psud.fr
CREATED:20230504
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PRIORITY:5
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SUMMARY:L.DE MEDICI:Mott Quantum Critical Points at Finite Doping
DESCRIPTION:\n We demonstrate that a finite-doping quantum critical point (QCP) naturally descends from the existence of a first-order Mott transition in the phase diagram of a strongly correlated material. In a prototypical case of a first-order Mott transition the surface associated with the equation of state for the homogeneous system is ”folded” so that in a range of parameters stable metallic and insulating phases exist and are connected by an unstable metallic branch.\n\nWe show that tuning the chemical potential causes the zero-temperature equation of state to gradually unfold. Under general conditions, we find that the Mott transition evolves into a first-order transition between two metals, associated to a phase separation region ending in the finite-doping QCP. This scenario is demonstrated by solving a simple multi-orbital Hubbard model relevant for the Iron-based superconductors, but its origin - the splitting of the atomic ground state multiplet by a small energy scale, here Hund’s coupling - is much more general. A strong analogy with cuprate superconductors is traced. \n\n\n[1] Chatzieleftheriou et al., Phys. Rev. Lett. 130, 066401 (2023).\n\n
URL:https://www.lps.u-psud.fr/events/medici-11052023/
ORGANIZER;CN=Andrej Mesaros:MAILTO:andrej.mesaros@universite-paris-saclay.fr
CATEGORIES:Séminaire de la Théorie de la Matière Condensée
LOCATION:Moyen amphi (LPS) + ONLINE (Zoom)
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