On the New Model of Non-Fermi Liquid for High Temperature Superconductivity

TL;DR

This paper proposes a new non-Fermi liquid model incorporating an SO(5) singlet, which explains phase transitions in high-temperature superconductors and suggests ways to enhance their critical temperature.

Contribution

It introduces the SO(5) singlet into the non-Fermi liquid model, providing a mechanism for phase transitions and potential increases in superconducting critical temperature.

Findings

SO(5) singlet induces phase transition between normal metal and pseudogap

Inclusion of the singlet can significantly raise the superconducting critical temperature

Model links antiferromagnetic and superconducting phases through the singlet order

Abstract

The importance of introducing the SO(5) singlet into the new novel model of non-Fermi liquid proposed by LeClair and collaborators is pointed out. This SO(5) singlet order parameter leads to a phase transition between the normal metal and the pseudogap region in the phase diagram for the anti-ferromagnetic (AF) phase and the (d-wave) superconducting (SC) phase. A non-zero value for this order can increase substantially the critical temperature of the SC transition.