Metallic stripe in two dimensions: stability and spin-charge separation

TL;DR

This paper analytically investigates charge stripe formation, spin-charge separation, and stability of antiphase domain walls in the t-J_z model, revealing that metallic stripes with confined holons are the ground state at low doping.

Contribution

It provides an analytical demonstration that metallic stripes with antiphase domain walls are the ground state in the low doping regime of the t-J_z model, highlighting spin-charge separation.

Findings

Metallic stripe with ADW is the ground state at low doping

Stripe described as spinons and confined holons coupled to 2D spin environment

Elementary excitations form a 1D band

Abstract

The problems of charge stripe formation, spin-charge separation, and stability of the antiphase domain wall (ADW) associated with a stripe are addressed using an analytical approach to the t-J_z model. We show that a metallic stripe together with its ADW is the ground state of the problem in the low doping regime. The stripe is described as a system of spinons and magnetically confined holons strongly coupled to the two dimensional (2D) spin environment with holon-spin-polaron elementary excitations filling a one-dimensional band.