Delocalized Spin States at Zigzag Termini of Armchair Graphene Nanoribbon

Overview

Journal Sci Rep

Specialty Science

Date 2024 May 21

PMID 38773311

Authors

Stefan Scepanovic

Amina Kimouche

Jovan Mirkovic

Gehad Sadiek

Tillmann Klamroth

Abdou Hassanien

Affiliations

Soon will be listed here.

Abstract

Using scanning tunneling microscopy and spectroscopy we demonstrate a revival of magnetism in 7-armchair nanoribbon by unpassivated atoms at the termini. Namely, a pair of intense Kondo resonances emerges at the peripheries of zigzag terminus revealing the many-body screening effects of local magnetic moments. Although Kondo resonance originates from a missing local orbital, it extends to a distance of 2.5 nm along the edge of the ribbon. The results are complemented by density functional theory calculations which suggest a possible coupling between Kondo states despite screening effects of substrate electrons. These findings indicate a possibility to restore intrinsic magnetic ordering in graphene nanoribbon without major structural modifications.

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