Gauge invariant dressed holon and spinon in doped cuprates

TL;DR

This paper introduces a gauge invariant partial charge-spin separation theory for doped cuprates, decoupling electrons into dressed holons and spinons to better understand charge transport and spin response.

Contribution

It develops a novel gauge invariant fermion-spin theory with dressed holons and spinons, satisfying local constraints and providing insights into cuprate properties.

Findings

Charge transport mainly influenced by dressed holon scattering from spinons.

Spin response dominated by dressed spinon scattering from holons.

Electron behavior modeled as coupled charge and spin degrees of freedom.

Abstract

We develop a partial charge-spin separation fermion-spin theory implemented the gauge invariant dressed holon and spinon. In this novel approach, the physical electron is decoupled as the gauge invariant dressed holon and spinon, with the dressed holon behaviors like a spinful fermion, and represents the charge degree of freedom together with the phase part of the spin degree of freedom, while the dressed spinon is a hard-core boson, and represents the amplitude part of the spin degree of freedom, then the electron single occupancy local constraint is satisfied. Within this approach, the charge transport and spin response of the underdoped cuprates is studied. It is shown that the charge transport is mainly governed by the scattering from the dressed holons due to the dressed spinon fluctuation, while the scattering from the dressed spinons due to the dressed holon fluctuation dominates the spin response.