3D nanostructuring of La0.7Sr0.3MnO3 thin film surfaces by scanning tunnelling microscopy

TL;DR

This study demonstrates precise 3D nanoscale surface modifications of La0.7Sr0.3MnO3 thin films using scanning tunneling microscopy, enabling controlled etching and surface termination at atomic-scale precision.

Contribution

It introduces a method for controlled 3D nanostructuring of La0.7Sr0.3MnO3 surfaces with atomic-scale accuracy using STM under ambient conditions.

Findings

Achieved lateral structures down to 1.5 nm

Controlled etching depth with half a unit cell precision

Reproducible surface termination control

Abstract

Nanoscale 3D surface modifications, by scanning tunneling microscopy under ambient conditions, of La0.7Sr0.3MnO3 thin films have been performed. It was demonstrated that there are well defined combinations of bias voltages and scan speeds which allow for controlled surface structuring. Lateral structures with sizes down to 1.5 nm are possible to obtain. Moreover, it is possible to reproducibly control the depth of etching with half a unit cell precision, enabling design of 3D surface structures and control of the surface termination of La0.7Sr0.3MnO3 through etching.