Energy Dependent Contrast in Atomic-Scale Spin-Polarized Scanning Tunneling Microscopy of Mn3N2 (010): Experiment and First-Principles Theory

Abstract

The technique of spin-polarized scanning tunneling microscopy is investigated for its use in determining fine details of surface magnetic structure down to the atomic scale. As a model sample, the row-wise anti-ferromagnetic Mn3N2(010) surface is studied. It is shown that the magnetic contrast in atomic-scale images is a strong function of the bias voltage around the Fermi level. Inversion of the magnetic contrast is also demonstrated. The experimental SP-STM images and height profiles are compared with simulated SPSTM images and height profiles based on spin-polarized density functional theory. The success of different tip models in reproducing the non-magnetic and magnetic STM data is explored. PACS: 68.37.Ef, 75.70.-i, 75.50.Ee, 75.70.Rf Corresponding author1, yang@helios.phy.ohiou.edu Corresponding author2, smitha2@ohio.edu

Cite this paper

@inproceedings{Yang2005EnergyDC, title={Energy Dependent Contrast in Atomic-Scale Spin-Polarized Scanning Tunneling Microscopy of Mn3N2 (010): Experiment and First-Principles Theory}, author={Rong Yang and Haiqiang Yang and Arthur R. Smith and J{\"{o}rg Neugebauer}, year={2005} }