Edge States in Doped Antiferromagnetic Nano-Structures

TL;DR

This paper investigates the behavior of edge states in doped antiferromagnetic nano-structures using advanced computational methods, revealing edge stripe formations and phase separation phenomena at intermediate interaction strengths.

Contribution

It introduces a detailed analysis of edge states in strongly correlated nano-structures with a focus on stripe formation and phase separation, using self-consistent Green's function and DMRG methods.

Findings

Edge stripe-like states form at intermediate J/t.

Edge stripes attach more readily than hole pairs.

Edge stripes can exhibit phase separation.

Abstract

We study competition between different phases in a strongly correlated nano-structure with an edge. Making use of the self-consistent Green's function and density matrix renormalization group methods, we study a system described by the t-Jz and t-J models on a strip of a square lattice with a linear hole density n_||. At intermediate interaction strength J/t we find edge stripe-like states, reminiscent of the bulk stripes that occur at smaller J/t. We find that stripes attach to edges more readily than hole pairs, and that the edge stripes can exhibit a peculiar phase separation.