Delocalized spin states at zigzag termini of armchair graphene nanoribbon

被引：0

作者：

Scepanovic, Stefan ^{[1
,2
]}

Kimouche, Amina ^{[3
]}

Mirkovic, Jovan ^{[2
]}

Sadiek, Gehad ^{[4
]}

Klamroth, Tillmann ^{[5
]}

Hassanien, Abdou ^{[1
]}

机构：

[1] Jozef Stefan Inst, 39 Jamova, Ljubljana 1000, Slovenia

[2] Univ Montenegro, Fac Sci, Podgorica 81000, Montenegro

[3] Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany

[4] Univ Sharjah, Dept Appl Phys & Astron, Sharjah 27272, U Arab Emirates

[5] Univ Potsdam, Inst Chem, D-14476 Potsdam, Germany

来源：

SCIENTIFIC REPORTS | 2024年 / 14卷 / 01期

关键词：

Graphene nanoribbon; Spin states; Kondo effect; Spin-spin correlations; EDGE STATE; SHAPE;

D O I：

10.1038/s41598-024-62624-9

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：8

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