Half-filled stripes in the t-t'-U Hubbard model

Abstract

Using a self-consistent Hartree-Fock approximation we investigate the relative stability of various stripe phases in the extended $t$-$t^{\prime }$-$U$ Hubbard model. One finds that a negative ratio of next- to nearest-neighbor hopping $t^{\prime }/t<0$ expells holes from antiferromagnetic domains and reinforces the stripe order. Therefore the half-filled stripes not only accommodate holes but also redistribute them so that the kinetic energy is gained, and these stripes take over in the regime of $t^{\prime }/t\simeq -0.3$ appropriate for YBa${}_2$Cu${}_3$O${}_{6+\delta }$.

Accepted for publication in Phys. Stat. Sol

References in corpus (2)

• How to detect fluctuating order in the high-temperature superconductors
• Stability of metallic stripes in the extended one-band Hubbard model

Cited by in corpus (3)

• Slave-boson approach to the metallic stripe phases with large unit cells
• Frustration effects at finite temperature in the half filled Hubbard model
• Mechanism of the reorientation of stripes in the cuprates