Temperature and carrier concentration dependence of Fermi arcs in moderately underdoped Bi2Sr2CaCu2O8+δ cuprate high-temperature superconductors: A joint density of states perspective

Abstract

Employing an autocorrelation analysis of angle resolved photoemission spectroscopy data, we have investigated the evolution of the joint density of states (JDOS) in the pseudogap phase of slightly underdoped Bi2Sr2CaCu2O8+δ(Bi2212) cuprate high temperature superconductors for different temperatures (T's) and carrier concentrations (δ's). Our JDOS analysis show that the Fermi arcs expand with increasing T at a fixed δ and with increasing δ at a specific T. Qualitatively, these observations are consistent with the theoretical scenarios of the pseudogap phase being a phase incoherent d-wave superconductor, in which the Fermi arcs are described in terms of a subtle balance between temperature-dependent lifetime broadening of the single-particle excitations and the magnitude of the pairing gap.

Source-reported materials — not catalogue approval

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