Numerical approach to low-doping regime of the t-J model

Abstract

We develop an efficient numerical method for the description of a single-hole motion in the antiferromagnetic background. The method is free of finite-size effects and allows calculation of physical properties at an arbitrary wavevector. Methodical increase of the functional space leads to results that are valid in the thermodynamic limit. We found good agreement with cumulant expansion, exact- diagonalization approaches on finite lattices as well as self-consistent Born approximations. The method allows a straightforward addition of other inelastic degrees of freedom, such as lattice effects. Our results confirm the existence of a finite quasiparticle weight near the band minimum for a single hole and the existence of string-like peaks in the single-hole spectral function.

6 pages, 6 figures, accepted for publication in PRB

References in corpus (3)

• Polaronic behavior of undoped high-Tc cuprates
• Asymmetry of the electronic states in hole- and electron-doped cuprates: Exact diagonalization study of the t-t'-t''-J model
• Spin-polaron excitations in a doped Shastry-Sutherland model

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• Nonequilibrium propagation and decay of a bound pair in driven t-J models
• Spin-polaron band structure and hole pockets in underdoped cuprates
• Effective approach to the Nagaoka regime of the two dimensional t-J model
• Optical conductivity in the t-J-Holstein Model
• Gain of the kinetic energy of bipolarons in the t-J-Holstein model based on electron-phonon coupling
• Ising t-J model close to half filling: A Monte Carlo study
• Slave-boson based configuration-interaction approach for the Hubbard model