Unambiguous connection between the Fermi surface topology and the pseudogap in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+d}$

Abstract

We study the behavior of the pseudogap in overdoped Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+d}$ by electronic Raman scattering (ERS) and angle-resolved photoemission spectroscopy (ARPES) on the same single crystals. Using both techniques we find that, unlike the superconducting gap, the pseudogap related to the anti-bonding band vanishes above the critical doping p${}_c$ = 0.22. Concomitantly, we show from ARPES measurements that the Fermi surface of the anti-bonding band is hole-like below pc and becomes electron-like above p${}_c$. This reveals that the appearance of the pseudogap depends on the Fermi surface topology in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+d}$ , and more generally, puts strong constraint on theories of the pseudogap phase.

arXiv comment6 pages , 3 figures

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• Thermodynamic signatures of quantum criticality in cuprates
• Nematic Fluctuations in the Cuprate Superconductor Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Universal relationship between the energy scales of the pseudogap phase, the superconducting state and the charge density wave order in copper oxide superconductors
• Peak-structure in self-energy of cuprate superconductors
• Exploration of the Hg-based cuprate superconductors by Raman spectroscopy under hydrostatic pressure
• Low-temperature T-linear resistivity in the strange metal phase of overdoped cuprate superconductors due to umklapp scattering from a spin excitation
• Influence of impurities on electronic structure in cuprate superconductors
• Low-temperature T${}^2$ resistivity in the underdoped pseudogap phase versus T-linear resistivity in the overdoped strange-metal phase of cuprate superconductors
• Renormalization of electrons in bilayer cuprate superconductors
• Universal phonon softening in the pseudogap state of Tl${}_2$Ba${}_2$Ca${}_{n-1}$Cu${}_n$O${}_{2n+4+\delta }$
• Spin singlet and quasiparticles excitations in cuprate superconductors
• Unusual electronic structure in underdoped cuprate superconductors
• Exceptional van Hove Singularities in Pseudogapped Metals
• Impurity-Scattering Assisted Umklapp Scattering as the Origin of Low-Temperature Resistivity in the Normal-State of Cuprate Superconductors