A simple model of the strange-metal phase in cuprates

TL;DR

This paper proposes a simple model explaining the strange-metal phase in cuprates by considering lattice defects and superlattice formation, which could account for the linear temperature dependence of resistivity observed experimentally.

Contribution

It introduces a minimal model linking lattice defects and superlattice formation to the strange-metal behavior in cuprates, highlighting the role of Umklapp processes.

Findings

Lattice defects form a superlattice beyond the pseudogap closing point.

Umklapp processes involving superlattice vectors can explain linear resistivity.

The model provides a plausible mechanism for strange-metal properties.

Abstract

Hole doping of superconducting cuprates generates lattice defects of O atoms. At and beyond closing of the pseudogap, p =< p*, they form a highly symmetric superlattice. Umklapp processes involving reciprocal lattice vectors associated with both the host lattice and the O superlattice could account for the linear temperature dependence of resistivity.