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X-ORIGINAL-URL:https://www.lps.u-psud.fr/
X-WR-CALNAME:Laboratoire de physique des Solides
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BEGIN:VEVENT
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DTSTART;TZID=Europe/Paris:20211216T110000
DTEND;TZID=Europe/Paris:20211216T120000
DTSTAMP:20211208T005700
UID:MEC-6e82873a32b95af115de1c414a1849cb@lps.u-psud.fr
CREATED:20211208
LAST-MODIFIED:20211208
PRIORITY:5
TRANSP:OPAQUE
SUMMARY:L. FRATINO: Exploring the phase diagram of the Hubbard model with several Cluster Dynamical Mean-Field Theory approaches
DESCRIPTION:\n         The Hubbard model exhibits a rich phase diagram already in the paramagnetic phase. By using continuous time quantum Monte Carlo, we study the two-dimensional Hubbard model on the square lattice with Dynamical Cluster Approximation (DCA), Cellular Dynamical Mean-Field Theory (CDMFT) and the Dimer Hubbard model on the Bethe lattice to address the unusual phenomena of the normal state. All these approaches show the Mott transition, a first order transition at half-filling between a metal and an insulator. As pointed out in previous studies with 4-site CDMFT, upon doping the insulator close to the critical Mott interaction at low temperature a pseudogap to correlated metal transition appears.\n\n\n\n         For the first time we will show that this metal to metal first order transition is not a peculiar mark of the method but is also present in the 8-site DCA DMFT. Moreover the study of the Dimer Hubbard model on the Bethe lattice (minimal cluster or multi-orbital theory possible) shows similar features creating a bridge linking the orbital selective Mott transition to the k-selective Mott transition typical of the pseudogap phase.\n\n\n\n[1] L.Fratino, P.Sémon, G.Sordi & A.-M.S. Tremblay, Sci Rep 6, 22715(2016).\n\n\n\n[2] L.Fratino, H.Shinaoka, Y.Nomura, L. De Medici, in preparation.\n\n\n\n[3] L.Fratino, S.Bag, A.Camjayi, M.Civelli, M.Rozenberg, arXiv:2109.06572 ( https://arxiv.org/abs/2109.06572 )\n
URL:https://www.lps.u-psud.fr/events/m-rancic-tba-912-203/
ORGANIZER;CN=Andrej Meszaros:MAILTO:
CATEGORIES:Séminaire de la Théorie de la Matière Condensée
LOCATION:Moyen amphi (LPS) + ONLINE (Zoom)
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