Charge-density waves in the Hubbard chain: evidence for 4k_F instability

Abstract

Charge density waves in the Hubbard chain are studied by means of finite-temperature Quantum Monte Carlo simulations and Lanczos diagonalizations for the ground state. We present results both for the charge susceptibilities and for the charge structure factor at densities ρ=1/6 and 1/3; for ρ=1/2 (quarter filled) we only present results for the charge structure factor. The data are consistent with a 4k_F instability dominating over the 2k_F one, at least for sufficiently large values of the Coulomb repulsion, U. This can only be reconciled with the Luttinger liquid analyses if the amplitude of the 2k_F contribution vanishes above some U^*(ρ).

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References in corpus (1)

• Ferromagnetic transition and phase diagram of the one-dimensional Hubbard model with next-nearest-neighbor hopping

Cited by in corpus (5)

• Luttinger liquid superlattices: realization of gapless insulating phases
• Charge-density waves in one-dimensional Hubbard superlattices
• Luttinger liquid superlattices
• Correlation exponent K_rho of the one-dimensional Kondo lattice model
• Modulation of charge-density waves by superlattice structures