The Fermi surface reconstruction in stripe phases of cuprates

TL;DR

This study uses mean-field theory to analyze stripe phases in hole-doped cuprates, revealing how Fermi surface segments and pockets form and relate to experimental phenomena like quantum oscillations.

Contribution

It provides a detailed mean-field analysis of Fermi surface reconstruction in stripe phases, including the potential formation of electron pockets in bilayer cuprates.

Findings

Fermi surface segments are linked to domain wall states.

Hole pockets appear under certain doping and temperature conditions.

Electron pockets may form in bilayer models, explaining quantum oscillations.

Abstract

Mean-field study of the stripe structures is conducted for a hole-doped Hubbard model. For bond-directed stripes, the Fermi surface consists of segments of an open surface and the boundaries of the hole pockets which appear in the diagonal region of momenta under certain conditions. Segments of the first type are due to one-dimensional bands of states localized on the domain walls. The relation of bands to the doping and temperature dependences of the Hall constant is discussed. In connection with the observation of quantum magnetic oscillations, a systematic search for the electron pockets has been carried out. It is shown that the formation of such pockets in bilayer models is quite possible.