Emergence of pseudogap from short-range spin-correlations in electron doped cuprates

Abstract

Electron interactions are pivotal for defining the electronic structure of quantum materials. In particular, the strong electron Coulomb repulsion is considered the keystone for describing the emergence of exotic and/or ordered phases of quantum matter as disparate as high-temperature superconductivity and charge- or magnetic-order. However, a comprehensive understanding of fundamental electronic properties of quantum materials is often complicated by the appearance of an enigmatic partial suppression of low-energy electronic states, known as the pseudogap. Here we take advantage of ultrafast angle-resolved photoemission spectroscopy to unveil the temperature evolution of the low-energy density of states in the electron-doped cuprate Nd${}_{\text{2-x}}$Ce${}_{\text{x}}$CuO${}_{\text{4}}$, an emblematic system where the pseudogap intertwines with magnetic degrees of freedom. By photoexciting the electronic system across the pseudogap onset temperature T*, we report the direct relation between the momentum-resolved pseudogap spectral features and the spin-correlation length with an unprecedented sensitivity. This transient approach, corroborated by mean field model calculations, allows us to establish the pseudogap in electron-doped cuprates as a precursor to the incipient antiferromagnetic order even when long-range antiferromagnetic correlations are not established, as in the case of optimal doping.

arXiv comment17 pages, 3 figures

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• Time- and Angle-Resolved Photoemission Studies of Quantum Materials
• Critical charge fluctuations and emergent coherence in a strongly correlated excitonic insulator
• Establishing non-thermal regimes in pump-probe electron-relaxation dynamics
• Time-resolved ARPES on cuprates: Tracking the low-energy electrodynamics in the time domain
• Magnetic, thermodynamic, and dynamical properties of the three-dimensional fermionic Hubbard model: A comprehensive Monte Carlo study
• Role of matrix elements in the time-resolved photoemission signal
• Disorder effects on hot spots in electron-doped cuprates
• Strange metals and planckian transport in a gapless phase from spatially random interactions
• Resilient Fermi liquid and strength of correlations near an antiferromagnetic quantum critical point
• Ubiquitous suppression of the nodal coherent spectral weight in Bi-based cuprates
• Magnetic field-tuned quantum criticality in optimally electron-doped cuprate thin films
• Fluctuation based interpretable analysis scheme for quantum many-body snapshots
• Quantum Monte Carlo study of the metal-insulator crossover in the square-lattice Hubbard model
• Collective Magnetic Excitations in a Photo-excited Electron-doped Cuprate Superconductor