Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session Y44: Electronic Structure of the Pseudogap Phase of the Hole-Doped CupratesInvited Live Streamed
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Sponsoring Units: DCMP Chair: Nirasha Thilakaratne, Tulane University Room: McCormick Place W-375C |
Friday, March 18, 2022 8:00AM - 8:36AM |
Y44.00001: Fermi surface transformation at the pseudogap critical point of a cuprate superconductor Invited Speaker: Louis Taillefer The pseudogap phase of cuprate superconductors is arguably the most enigmatic phase of quantum matter. In particular, a fundamental question remains open: what is the Fermi surface of the pure pseudogap phase? [1] |
Friday, March 18, 2022 8:36AM - 9:12AM |
Y44.00002: Incoherent strange metal sharply bounded by a critical doping in Bi2212 Invited Speaker: Zhi-Xun Shen
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Friday, March 18, 2022 9:12AM - 9:48AM |
Y44.00003: Hidden magnetism at the pseudogap critical point of a cuprate superconductor Invited Speaker: Marc-Henri Julien
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Friday, March 18, 2022 9:48AM - 10:24AM |
Y44.00004: A theory of the pseudogap metal in the hole doped cuprate Invited Speaker: Yahui Zhang We propose a new theoretical framework for the pseudogap metal in the hole doped cuprate. Our theory is based on a recently devloped parton description using hidden layers. We introduce two ancilla qubits per square lattice site, and employ them to obtain a variational wave function of a fractionalized Fermi liquid for the pseudogap metal state. The theory describes not only the fractionalized Fermi liquid, but also the conventional Fermi liquid, and possible exotic intermediate phases and critical points. The fractionalized Fermi liquid has hole pockets with quasiparticle weight which is large only on Fermi arcs, and fermionic spinon excitations, which carry charges of the emergent gauge fields. |
Friday, March 18, 2022 10:24AM - 11:00AM |
Y44.00005: Fermi arcs vs hole pockets Invited Speaker: A.-M. S Tremblay Many phenomena in cuprates can be explained using cluster extensions of dynamical mean-field theory [1]. This methodology resolves the dichtomy between local and non-local plysics through a self-consistency condition. It provides a unified picture of many phenomena in cuprates, in particular those associated with the pseudogap [2][3]. However, predicting details of the Fermi surface requires an additional step known as periodization. Here [4] we show that the observation of Fermi arcs is not sufficient to definitely conclude whether there are Fermi arcs. To show this, we introduce a simple parametrization of the self-energy (c-2B), in the spirit of Yang-Rice-Zhang theory, and show that Fermi arcs can appear when hole pockets should be the correct answer, and this, independently of the periodization (cumulant or Green's function) used to display spectral weights of the infinite lattice. In addition, only two adjustable parameters in this simple c-2B model suffice to reproduce the qualitative details of the frequency and momentum dependence of the low energy Cellular Dynamical Mean-Field Theory (c-DMFT) spectral weight for both periodizations. We provide a new "compact tiling" scheme to recover the hole and electron pockets of our starting non-interacting lattice model, suggesting that better periodization schemes might exist. |
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