scholarly journals Shot noise probing of magnetic ordering in zigzag graphene nanoribbons

2009 ◽  
Vol 79 (24) ◽  
Author(s):  
Ralitsa L. Dragomirova ◽  
Denis A. Areshkin ◽  
Branislav K. Nikolić
Keyword(s):  
Shot Noise ◽  
Graphene Nanoribbons ◽  
Magnetic Ordering ◽  
Zigzag Graphene Nanoribbons

ON THE ROBUSTNESS OF MAGNETISM IN ZIGZAG GRAPHENE NANORIBBONS

2013 ◽  
Vol 27 (15) ◽  
pp. 1350111
Author(s):  
MAZIAR NOEI ◽  
KAVEH KHALIJI ◽  
MORTEZA FATHIPOUR
Keyword(s):  
Transverse Electric ◽  
Electronic Band Structure ◽  
Graphene Nanoribbons ◽  
Magnetic Ordering ◽  
Single Atom ◽  
Charge Density Distribution ◽  
Half Metallicity ◽  
Electronic Band ◽  
Nontrivial Behavior ◽  
Zigzag Graphene Nanoribbons

In this work, using the single-band Hubbard model, we numerically study the magnetic ordering in zigzag graphene nanoribbons (ZGNRs). We calculate density of states and charge density distribution in the ZGNR, and show the nontrivial behavior of its electronic band structure in the presence of an external transverse electric field. Then, the robustness of such edge magnetic ordering and consequent half-metallicity is investigated for nanoribbons defected with single-atom vacancies. Our results show that the nontrivial magnetic properties of ZGNRs are robust to an acceptable percentage of single atom vacancies.

Topological Surface State in Epitaxial Zigzag Graphene Nanoribbons

Nano Letters ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2876-2882
Author(s):  
Thi Thuy Nhung Nguyen ◽  
Niels de Vries ◽  
Hrag Karakachian ◽  
Markus Gruschwitz ◽  
Johannes Aprojanz ◽  
...  
Keyword(s):  
Surface State ◽  
Graphene Nanoribbons ◽  
Topological Surface ◽  
Topological Surface State ◽  
Zigzag Graphene Nanoribbons

scholarly journals Spin current distribution in antiferromagnetic zigzag graphene nanoribbons under transverse electric fields

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jie Zhang ◽  
Eric P. Fahrenthold
Keyword(s):  
Electric Fields ◽  
Transverse Electric ◽  
Graphene Nanoribbons ◽  
Spin Current ◽  
Differential Resistance ◽  
Current Control ◽  
Field Analysis ◽  
Current Transmission ◽  
Transverse Electric Fields ◽  
Zigzag Graphene Nanoribbons

AbstractThe spin current transmission properties of narrow zigzag graphene nanoribbons (zGNRs) have been the focus of much computational research, investigating the potential application of zGNRs in spintronic devices. Doping, fuctionalization, edge modification, and external electric fields have been studied as methods for spin current control, and the performance of zGNRs initialized in both ferromagnetic and antiferromagnetic spin states has been modeled. Recent work has shown that precise fabrication of narrow zGNRs is possible, and has addressed long debated questions on their magnetic order and stability. This work has revived interest in the application of antiferromagnetic zGNR configurations in spintronics. A general ab initio analysis of narrow antiferromagnetic zGNR performance under a combination of bias voltage and transverse electric field loading shows that their current transmission characteristics differ sharply from those of their ferromagnetic counterparts. At relatively modest field strengths, both majority and minority spin currents react strongly to the applied field. Analysis of band gaps and current transmission pathways explains the presence of negative differential resistance effects and the development of spatially periodic electron transport structures in these nanoribbons.

Defect-mediated half-metal behavior in zigzag graphene nanoribbons

2009 ◽  
Vol 80 (7) ◽  
Author(s):  
R. Y. Oeiras ◽  
F. M. Araújo-Moreira ◽  
E. Z. da Silva
Keyword(s):  
Graphene Nanoribbons ◽  
Half Metal ◽  
Zigzag Graphene Nanoribbons

Computational Study on Removal of Epoxide from Narrow Zigzag Graphene Nanoribbons

2014 ◽  
Vol 118 (46) ◽  
pp. 27123-27130 ◽  
Author(s):  
Heesoo Park ◽  
Jin Yong Lee ◽  
Seokmin Shin
Keyword(s):  
Graphene Nanoribbons ◽  
Computational Study ◽  
Zigzag Graphene Nanoribbons
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