Title Stripes in Microscopic Theory of High-Tc Superconductivity

TL;DR

This paper demonstrates that a realistic 3-band model can exhibit d-wave pairing characteristic of high-Tc superconductors only when charge-density stripes are present, aligning with experimental observations without adjustable parameters.

Contribution

It shows that charge-density stripes are essential for d-wave pairing in a realistic 3-band model of high-Tc superconductors, with no need for fine-tuning.

Findings

Charge-density stripes enable d-wave pairing.

Model aligns qualitatively with experimental data.

No adjustable parameters required.

Abstract

We examine a realistic 3-band model, finding it capable of exhibiting the d-wave pairing characteristic of CuO2-based high-Tc superconductors, but only in the presence of symmetry-lowering charge-density stripes aligned along (1,0) axes, preferably of diameter 2 cell-widths. The present theoretical treatment has no adjustable parameters (the unit of energy t^2/V factors out of both kinetic and potential energy terms,) does not require fine-tuning, and is in qualitative accord with experiment.