Spin-charge gauge symmetry: A way to tackle HTS cuprates?

TL;DR

This paper introduces a spin-charge gauge theory for the 2D t-J model to explain various transport phenomena in high-temperature cuprates, aligning well with experimental data across different phases.

Contribution

It presents a novel gauge-theoretic approach to understanding the normal state transport properties of high-Tc cuprates, providing qualitative agreement with experimental observations.

Findings

Reproduces pseudogap phase resistivity and NMR relaxation behavior.

Explains linear T dependence in strange metal phase.

Accounts for infrared conductivity maxima in underdoped and overdoped samples.

Abstract

We propose an explanation of several experimental features of transport phenomena in the normal state of high Tc cuprates in terms of a spin-charge gauge theory of the 2D t-J model. The calculated doping-temperature dependence for a number of physical quantities is found in qualitative agreement with data. In particular, we recover: in the ``pseudogap phase'' the metal-insulator crossover of the in-plane resistivity and of the NMR ``relaxation time'' and the insulating behavior of the out-of-plane resistivity; in the ``strange metal phase'' (at higher temperature or doping) the linear in T behavior of the above quantities; the appearance of maxima in the in-plane far-infrared conductivity in strongly underdoped and overdoped samples.