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DTSTART;TZID=Europe/London:20250507T150000
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DTSTAMP:20260521T171819
CREATED:20250402T125159Z
LAST-MODIFIED:20250402T133323Z
UID:6603-1746630000-1746635400@thomasyoungcentre.org
SUMMARY:TYC Seminar: Transformation of a Fermi surface into Luttinger arcs: A novel analytical insight - Alessandro Toschi\, TU Wien\, Austria
DESCRIPTION:TYC Seminar: Transformation of a Fermi surface into Luttinger arcs: A novel analytical insight – Alessandro Toschi\, TU Wien\, Austria Share on X\n\n\n\n\n \n\n\n\n\nRegister here\n\n\n\n\n\n\n\n\nAlessandro Toschi\, Institute of Solid State Physics\, TU Wien\, Austria \n\n\n\nTransformation of a Fermi surface into Luttinger arcs: A novel analytical insightI 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. 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 \n\n\n\n(2007); G. Rohringer et al.\, Rev. Mod. Phys. 90\, 025003 (2018).
URL:https://thomasyoungcentre.org/event/transformation-of-a-fermi-surface-into-luttinger-arcs-a-novel-analytical-insight-alessandro-toschi-institute-of-solid-state-physics-tu-wien-austria/
LOCATION:S0.03\, King’s College London\, Strand Campus\, Strand Building\, WC2R 2LS
CATEGORIES:Main event
ORGANIZER;CN="Jan Tomczak":MAILTO:jan.tomczak@kcl.ac.uk
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