Particle-hole Asymmetry in the Cuprate Pseudogap Measured with Time-Resolved Spectroscopy

Abstract

One of the most puzzling features of high-temperature cuprate superconductors is the pseudogap state, which appears above the temperature at which superconductivity is destroyed. There remain fundamental questions regarding its nature and its relation to superconductivity. But to address these questions, we must first determine whether the pseudogap and superconducting states share a common property: particle-hole symmetry. We introduce a new technique to test particle-hole symmetry by using laser pulses to manipulate and measure the chemical potential on picosecond time scales. The results strongly suggest that the asymmetry in the density of states is inverted in the pseudogap state, implying a particle-hole asymmetric gap. Independent of interpretation, these results can test theoretical predictions of the density of states in cuprates.

arXiv comment6 pages, 4 figures

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Cited by in corpus (13)

• Time- and Angle-Resolved Photoemission Studies of Quantum Materials
• Anomalies in the pseudogap phase of the cuprates: Competing ground states and the role of umklapp scattering
• Topological Mott Insulator at Quarter Filling in the Interacting Haldane Model
• Doped Mott Insulators Break ${\mathbb{Z}}_2$ Symmetry of a Fermi Liquid: Stability of Strongly Coupled Fixed Points
• Mode-selective coupling of coherent phonons to the Bi2212 electronic band structure
• Dynamics of correlation-frozen antinodal quasiparticles in superconducting cuprates
• Time-resolved ARPES on cuprates: Tracking the low-energy electrodynamics in the time domain
• Thermodynamics of an Exactly Solvable Model for Superconductivity in a Doped Mott Insulator
• Work function seen with sub-meV precision through laser photoemission
• Interplay of superconductivity and bosonic coupling in the peak-dip-hump structure of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Photoinduced filling of near nodal gap in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Evidences for interaction-induced Haldane fractional exclusion statistics in one and higher dimensions
• Auxiliary fermion approach to the RIXS spectrum in a doped cuprate