States induced in the single-particle spectrum by doping a Mott insulator

Abstract

In strongly correlated electron systems, the emergence of states in the Mott gap in the single-particle spectrum following the doping of the Mott insulator is a remarkable feature that cannot be explained in a conventional rigid-band picture. Here, based on an analysis of the quantum numbers and the overlaps of relevant states, as well as through a demonstration using the ladder and bilayer t-J models, it is shown that in a continuous Mott transition due to hole doping, the magnetically excited states of the Mott insulator generally emerge in the electron-addition spectrum with the dispersion relation shifted by the Fermi momentum in the momentum region where the lower Hubbard band is not completely filled. This implies that the dispersion relation of a free-electron-like mode in the electron-addition spectrum eventually transforms into essentially the momentum-shifted magnetic dispersion relation of the Mott insulator, while its spectral weight gradually disappears toward the Mott transition. This feature reflects the spin-charge separation of the Mott insulator.

7 pages, 1 figure

References in corpus (9)

• Evolution of electronic structure of doped Mott insulators - reconstruction of poles and zeros of Green's function
• Asymmetry of the electronic states in hole- and electron-doped cuprates: Exact diagonalization study of the t-t'-t''-J model
• Doped high-Tc cuprate superconductors elucidated in the light of zeros and poles of electronic Green's function
• Mott Transition in the Two-Dimensional Hubbard Model
• Composite-Fermion Theory for Pseudogap, Fermi Arc, Hole Pocket, and Non-Fermi-Liquid of Underdoped Cuprate Superconductors
• Temperature and doping dependence of high-energy kink in cuprates
• Spectral properties near the Mott transition in the two-dimensional Hubbard model with next-nearest-neighbor hopping
• Spectral properties near the Mott transition in the two-dimensional t-J model
• Relationship between single-particle excitation and spin excitation at the Mott Transition

Cited by in corpus (10)

• Spectral function of the 2D Hubbard model: a density matrix renormalization group plus cluster perturbation theory study
• Spectral properties near the Mott transition in the two-dimensional t-J model
• Characteristics of the Mott transition and electronic states of high-temperature cuprate superconductors from the perspective of the Hubbard model
• The spectral function of Mott-insulating Hubbard ladders: From fractionalized excitations to coherent quasi-particles
• Emergence and spectral-weight transfer of electronic states in the Hubbard ladder
• Mott transition and electronic excitation of the Gutzwiller wavefunction
• Temperature-driven change in band structure reflecting spin-charge separation of Mott and Kondo insulators
• Emergence of electronic modes by doping Kondo insulators in the Kondo lattice and periodic Anderson models
• Emergence and evolution of electronic modes with temperature in spin-gapped Mott and Kondo insulators
• Electronic modes induced by spin and charge perturbations in Mott and Kondo insulators