Mechanism of the reorientation of stripes in the cuprates

TL;DR

This paper uses mean field theory within the slave-boson approach to study how electron correlations and next-nearest neighbor hopping influence stripe orientations in cuprate superconductors, revealing a doping-dependent crossover.

Contribution

It demonstrates the significant role of next-nearest neighbor hopping $t'$ in controlling stripe reorientation in cuprates at low doping levels.

Findings

Finite $t'$ influences stripe orientation transition.

Crossover from filled diagonal to half-filled vertical/horizontal stripes at doping ~1/16.

Electron correlations affect stripe stability and orientation.

Abstract

Using the mean field theory in the slave-boson approach we analyzed the electron correlation effects in the stripe phases. One finds that a finite next-nearest neighbor hopping $t'$ plays an important role in the low doping regime, where it controls the crossover from the filled diagonal to half-filled vertical/horizontal stripes at doping $ x\simeq 1/16$.