Magnetic edge states and coherent manipulation of graphene nanoribbons

Nature
Michael SlotaLapo Bogani

Abstract

Graphene, a single-layer network of carbon atoms, has outstanding electrical and mechanical properties 1 . Graphene ribbons with nanometre-scale widths2,3 (nanoribbons) should exhibit half-metallicity 4 and quantum confinement. Magnetic edges in graphene nanoribbons5,6 have been studied extensively from a theoretical standpoint because their coherent manipulation would be a milestone for spintronic 7 and quantum computing devices 8 . However, experimental investigations have been hampered because nanoribbon edges cannot be produced with atomic precision and the graphene terminations that have been proposed are chemically unstable 9 . Here we address both of these problems, by using molecular graphene nanoribbons functionalized with stable spin-bearing radical groups. We observe the predicted delocalized magnetic edge states and test theoretical models of the spin dynamics and spin-environment interactions. Comparison with a non-graphitized reference material enables us to clearly identify the characteristic behaviour of the radical-functionalized graphene nanoribbons. We quantify the parameters of spin-orbit coupling, define the interaction patterns and determine the spin decoherence channels. Even without any optimization, the...Continue Reading

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Citations

Sep 27, 2018·Nanoscale·Víctor M García-SuárezJaime Ferrer
Nov 9, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Shiyuan Gao, Li Yang
Aug 6, 2019·Advanced Materials·Giorgio ZoppellaroRadek Zbořil
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Jun 27, 2020·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Haoming Shen, Qiang Sun
Apr 17, 2019·Nature Communications·Zhibing TanWenjing Hong
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Sep 19, 2020·Advanced Materials·Zongping ChenKlaus Müllen
May 29, 2018·Nature·Fernando Luis, Eugenio Coronado
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Feb 8, 2020·Scientific Reports·Nils RichterMathias Kläui
Jun 4, 2020·The Journal of Chemical Physics·Alberto GarcíaJavier Junquera
Sep 22, 2020·Chemistry, an Asian Journal·Ashok KeerthiKlaus Müllen
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Mar 4, 2021·ACS Nano·Vivek SaraswatMichael S Arnold
Feb 27, 2021·Angewandte Chemie·Yong YangMichal Juríček
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Apr 29, 2020·The Journal of Physical Chemistry Letters·Murugan Rathamony AjayakumarMarta Mas-Torrent
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Jul 4, 2019·Journal of the American Chemical Society·Fugui XuYiyong Mai
Feb 6, 2020·ACS Applied Materials & Interfaces·Mikhail ShekhirevAlexander Sinitskii

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Methods Mentioned

BETA
ESR
nuclear magnetic resonance
size-exclusion chromatography

Software Mentioned

Gaussian
Matlab
DEER
DeerAnalysis
SIESTA

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