Photoemission spectra of many-polaron systems

Abstract

The cross over from low to high carrier densities in a many-polaron system is studied in the framework of the one-dimensional spinless Holstein model, using unbiased numerical methods. Combining a novel quantum Monte Carlo approach and exact diagonalization, accurate results for the single-particle spectrum and the electronic kinetic energy on fairly large systems are obtained. A detailed investigation of the quality of the Monte Carlo data is presented. In the physically most important adiabatic intermediate electron-phonon coupling regime, for which no analytical results are available, we observe a dissociation of polarons with increasing band filling, leading to normal metallic behavior, while for parameters favoring small polarons, no such density-driven changes occur. The present work points towards the inadequacy of single-polaron theories for a number of polaronic materials such as the manganites.

15 pages, 13 figures; final version, accepted for publication in Phys. Rev. B

References in corpus (3)

• Quantum Monte Carlo and variational approaches to the Holstein model
• Luttinger liquid versus charge density wave behaviour in the one-dimensional spinless fermion Holstein model
• Holstein polaron in two and three dimensions by quantum Monte Carlo

Cited by in corpus (19)

• The Kernel Polynomial Method
• The Green's Function of the Holstein Polaron
• Systematic improvement of the Momentum Average approximation for the Green's function of a Holstein polaron
• Excitation spectra and spin gap of the half-filled Holstein-Hubbard model
• Bipolaron in the t-J model coupled to longitudinal and transverse quantum lattice vibrations
• Machine learning-based inversion of nuclear responses
• Angle-resolved photoemission spectroscopy of band tails in lightly doped cuprates
• Effect of Electron-Phonon Interaction Range for a Half-Filled Band in One Dimension
• Optical absorption and activated transport in polaronic systems
• Dynamic charge correlations near the Peierls transition
• Spectral functions of the spinless Holstein model
• Phonon spectral function of the Holstein polaron
• Interplay of charge, spin and lattice degrees of freedom on the spectral properties of the one-dimensional Hubbard-Holstein model
• Optical conductivity of polaronic charge carriers
• Local dynamical lattice instabilities: Prerequisites for resonant pairing superconductivity
• Many-polaron problem by cluster perturbation theory
• High temperature superconductivity from realistic long-range Coulomb and Fröhlich interactions
• Phase transition and phase diagram at a general filling in the spinless one-dimensional Holstein Model
• Carrier-density effects in many-polaron systems