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X-WR-CALNAME:Laboratoire de physique des Solides
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DTSTART;TZID=Europe/Paris:20250327T110000
DTEND;TZID=Europe/Paris:20250327T180000
DTSTAMP:20250318T093600
UID:MEC-2c60e40b399dc55d8b755ec6b5d09f8a@lps.u-psud.fr
CREATED:20250318
LAST-MODIFIED:20250318
PRIORITY:5
TRANSP:OPAQUE
SUMMARY:Alessandro TOSCHI : Fermi and Luttinger Arcs: Two Concepts, Realized on One Surface
DESCRIPTION:\nContact: andrej.mesaros@universite-paris-saclay.fr ( mailto:andrej.meszaros@universite-paris-saclay.fr )\n\n\n\nLe résumé :\n\n\n\n  I will present [1] an analytically solvable model for correlated electrons, which is able to capture the major Fermi surface modifications occurring in both hole- and electron-doped cuprates as a function of doping. The proposed Hamiltonian, which represents an extension of the Hatsugai-Kohmoto model [2], qualitatively reproduces the results of numerically demanding many-body calculations, here obtained using the dynamical vertex approximation [3] in its ladder implementation.\n\n\n\n    Our analytical theory provides a transparent description of a precise mechanism, capable of driving the formation of disconnected segments along the Fermi surface (the highly debated “Fermi arcs”), as well as the opening of a pseudogap in hole and electron doping. This occurs through a specific mechanism: The electronic states on the Fermi arcs remain intact, while the Fermi surface part where the gap opens transforms into a Luttinger arc. \n\n\n\n[1] P. Worm, M. Reitner, K. Held, and A. Toschi, Phys. Rev. Lett. 133, 166501 (2024).\n\n\n\n[2] Y. Hatsugai and M. Kohmoto, J. Phys. Soc. Jpn. 61, 2056 (1992).\n\n\n\n[3] A. Toschi, A.A. Katanin, and K. Held, Phys. Rev. B 75, 045118 (2007); G. Rohringer et al., Rev. Mod. Phys. 90, 025003 (2018).\n
URL:https://www.lps.u-psud.fr/en/events/alessandro-toschi-fermi-and-luttinger-arcs-two-concepts-realized-on-one-surface/
CATEGORIES:Condensed Matter Theory Seminar,Seminars
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