Large insulating nitride islands on Cu3Au as a template for atomic spin structures

TL;DR

This paper demonstrates the controlled growth of large insulating nitride islands on Cu3Au surfaces, providing an improved template for atomic spin structures with larger, unstrained islands compared to previous systems.

Contribution

It introduces a new method for growing larger insulating nitride islands on Cu3Au, enhancing the potential for atomic-scale magnetic manipulation.

Findings

Larger nitride islands (tens to hundreds of nm) achieved on Cu3Au surface.

No observable difference in adatom behavior between new and previous templates.

Enhanced lattice matching allows for bigger, unstrained islands.

Abstract

We present controlled growth of c(2$\times$2)N islands on the (100) surface of Cu$_3$Au, which can be used as an insulating surface template for manipulation of magnetic adatoms. Compared to the commonly used Cu(100)/c(2$\times$2)N surface, where island sizes do not exceed several nanometers due to strain limitation, the current system provides better lattice matching between metal and adsorption layer, allowing larger unstrained islands to be formed. We show that we can achieve island sizes ranging from tens to hundreds of nanometers, increasing the potential building area by a factor 10$^3$. Initial manipulation attempts show no observable difference in adatom behaviour, either in manipulation or spectroscopy.