Pseudogap and Spin Fluctuations in the Normal State of Electron-Doped Cuprates

TL;DR

This paper uses many-body calculations to explain the pseudogap and spin fluctuations in electron-doped cuprates, aligning with recent experiments and predicting phase diagram features.

Contribution

It provides a detailed theoretical explanation of pseudogap phenomena and spin fluctuations in electron-doped cuprates using the Hubbard model, matching experimental data.

Findings

Pseudogap originates from antiferromagnetic spin fluctuations.

Calculated correlation lengths match neutron scattering data.

Predictions made for photoemission, neutron scattering, and phase diagram.

Abstract

We present reliable many-body calculations for the t-t'-t''-U Hubbard model that explain in detail the results of recent angle-resolved photoemission experiments on electron-doped high-temperature superconductors. The origin of the pseudogap is traced to two-dimensional antiferromagnetic spin fluctuations whose calculated temperature dependent correlation length also agrees with recent neutron scattering measurements. We make specific predictions for photoemission, for neutron scattering and for the phase diagram.