String excitations of a hole in a quantum antiferromagnet and photoelectron spectrospopy

Abstract

The aim of the present paper is twofold. The first goal is to show that high resolution angle-resolved photoelectron spectra from cuprates indicate the presence of string-like excitations of the quasihole excitation in a quantum antiferromagnet. In order to compare with the experimental intensity plots, we calculate the spectral function of the t-J and the t-t'-t"-J models within the self-consistent Born approximation for widely accepted values of the parameters of these models. The main features of the high resolution photoelectron spectra are in general agreement with the results based on the above models and can be understood by considering not only the lowest energy quasiparticle peak but, also, the higher energy string-like excitations of the hole. The second goal of the present paper is to make the case that a proper analysis of both the numerical results obtained from these models and of the experimental results, suggests a theoretical picture for the internal structure of the hole-quasiparticle and a string-exchange pairing mechanism due to strong antiferromagnetic correlations among the background spins. We find that, using a simple model in which the Hilbert space is restricted to states of only unbroken strings attached to the holes and in which the holes are connected with unbroken strings, we can provide a good quantitative description of the most accurate numerical results. We find that the holes experience an effective interaction due to a string-exchange mechanism which is characterized by a rather large string tension and this can provide pairing energy scales much larger that those suggested by spin-fluctuation mediated pairing models. In addition, it is argued that such string-exchange interaction tends to bind holes in a bound state with the $d_{x^2-y^2}$ symmetry.

10 two-column pages, 12 figures

References in corpus (2)

• Anomalous high energy dispersion in photoemission spectra from insulating cuprates
• Possible observation of "string excitations" of a hole in a quantum antiferromagnet

Cited by in corpus (33)

• Exploration of doped quantum magnets with ultracold atoms
• High Energy Dispersions in Bi2Sr2CaCu2O8 High Temperature Superconductor from Laser-Based Angle-Resolved Photoemission
• Effect of strong correlations on the high energy anomaly in hole- and electron-doped high-Tc superconductors
• Microscopic spinon-chargon theory of magnetic polarons in the t-J model
• Strong pairing in mixed dimensional bilayer antiferromagnetic Mott insulators
• Extracting the spectral function of the cuprates by a full two-dimensional analysis: Angle-resolved photoemission spectra of Bi2Sr2CuO6
• Hole in the 2D Ising Antiferromagnet: Origin of the Incoherent Spectrum
• Pairing of holes by confining strings in antiferromagnets
• Holes and magnetic polarons in a triangular lattice antiferromagnet
• Rotational Resonances and Regge Trajectories in Lightly Doped Antiferromagnets
• Spin-polaron band structure and hole pockets in underdoped cuprates
• Characteristics of the Mott transition and electronic states of high-temperature cuprate superconductors from the perspective of the Hubbard model
• Finite-Temperature Hole-Magnon Dynamics in an Antiferromagnet
• High energy kink in the dispersion of a hole in an antiferromagnet -- double-occupancy effects on electronic excitations
• Electron self-energy from quantum charge fluctuations in the layered t-J model with long-range Coulomb interaction
• Finite temperature spectral function of a hole in a quantum antiferromagnet and role of phonons
• Feshbach hypothesis of high-Tc superconductivity in cuprates
• On the cuprates' universal waterfall feature: evidence of a momentum-driven crossover
• Scattering theory of mesons in doped antiferromagnetic Mott insulators: Multichannel perspective and Feshbach resonance
• Exciton interacting with a moiré lattice: Polarons, strings, and optical probing of spin correlations
• Magnon-assisted dynamics of a hole doped in a cuprate superconductor
• Photoemission Spectrum of Ca2RuO4: Spin Polaron Physics in an S=1 Antiferromagnet with Anisotropies
• Paramagnon dispersion and damping in doped Na${}_x$Ca${}_{2-x}$CuO${}_2$Cl${}_2$
• Local correlations necessitate waterfalls as a connection between quasiparticle band and developing Hubbard bands
• Kinetic magnetism in the crossover between the square and triangular lattice Fermi-Hubbard models
• Machine-learning the spectral function of a hole in a quantum antiferromagnet
• Orbital Rotations induced by Charges of Polarons and Defects in Doped Vanadates
• Spatial structure of magnetic polarons in strongly interacting antiferromagnets
• Probing the pseudogap and beyond: Examining single-particle properties of the hole- and electron-doped Hubbard model
• Magnetic polarons due to spin-length fluctuations in ${\mathbf{d}}^4$ spin-orbit Mott systems
• Possibility of hole confinement in the weak coupling regime of one dimensional ising antiferromagnet and the emergence of spin-charge separation in the bulk limit
• Formation of CuO${}_2$ sublattices by suppression of interlattice correlations in tetragonal CuO
• Theory of Angle Resolved Photoemission Spectroscopy of Altermagnetic Mott Insulators