We investigate the nature of the interaction-driven Mott-Hubbard transition of the half-filled t(1)-t(2) Hubbard model in one dimension, using a full-fledged variational Monte Carlo approach including a distance-dependent Jastrow factor and backflow correlations. We present data for the evolution of the magnetic properties across the Mott-Hubbard transition and on the commensurate to incommensurate transition in the insulating state. Analyzing renormalized excitation spectra, we find that the Fermi surface renormalizes to perfect nesting right at the Mott-Hubbard transition in the insulating state, with a first-order reorganization when crossing into the conducting state.

Interaction-induced Fermi-surface renormalization in the t(1)-t(2) Hubbard model close to the Mott-Hubbard transition

Tocchio, Luca Fausto;Becca, Federico;
2010-01-01

Abstract

We investigate the nature of the interaction-driven Mott-Hubbard transition of the half-filled t(1)-t(2) Hubbard model in one dimension, using a full-fledged variational Monte Carlo approach including a distance-dependent Jastrow factor and backflow correlations. We present data for the evolution of the magnetic properties across the Mott-Hubbard transition and on the commensurate to incommensurate transition in the insulating state. Analyzing renormalized excitation spectra, we find that the Fermi surface renormalizes to perfect nesting right at the Mott-Hubbard transition in the insulating state, with a first-order reorganization when crossing into the conducting state.
2010
81
20
205109
http://link.aps.org/doi/10.1103/PhysRevB.81.205109
Tocchio, Luca Fausto; Becca, Federico; Gros, C.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/32455
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