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Magnetic edge states and coherent manipulation of graphene nanoribbons

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Magnetic edge states and coherent manipulation of graphene nanoribbons. / Slota, Michael; Keerthi, Ashok; Myers, William K. et al.
In: Nature, Vol. 557, No. 7707, 30.05.2018, p. 691-695.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Slota, M, Keerthi, A, Myers, WK, Tretyakov, E, Baumgarten, M, Ardavan, A, Sadeghi, H, Lambert, CJ, Narita, A, Müllen, K & Bogani, L 2018, 'Magnetic edge states and coherent manipulation of graphene nanoribbons', Nature, vol. 557, no. 7707, pp. 691-695. https://doi.org/10.1038/s41586-018-0154-7

APA

Slota, M., Keerthi, A., Myers, W. K., Tretyakov, E., Baumgarten, M., Ardavan, A., Sadeghi, H., Lambert, C. J., Narita, A., Müllen, K., & Bogani, L. (2018). Magnetic edge states and coherent manipulation of graphene nanoribbons. Nature, 557(7707), 691-695. https://doi.org/10.1038/s41586-018-0154-7

Vancouver

Slota M, Keerthi A, Myers WK, Tretyakov E, Baumgarten M, Ardavan A et al. Magnetic edge states and coherent manipulation of graphene nanoribbons. Nature. 2018 May 30;557(7707):691-695. doi: 10.1038/s41586-018-0154-7

Author

Slota, Michael ; Keerthi, Ashok ; Myers, William K. et al. / Magnetic edge states and coherent manipulation of graphene nanoribbons. In: Nature. 2018 ; Vol. 557, No. 7707. pp. 691-695.

Bibtex

@article{9a5e4eee56594a578ac42edb35f2930a,
title = "Magnetic edge states and coherent manipulation of graphene nanoribbons",
abstract = "Graphene, a single-layer network of carbon atoms, has outstanding electrical and mechanical properties. Graphene ribbons with nanometre-scale widths (nanoribbons) should exhibit half-metallicity and quantum confinement. Magnetic edges in graphene nanoribbons have been studied extensively from a theoretical standpoint because their coherent manipulation would be a milestone for spintronic and quantum computing devices. 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. 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 spin coherence time is in the range of microseconds at room temperature, and we perform quantum inversion operations between edge and radical spins. Our approach provides a way of testing the theory of magnetism in graphene nanoribbons experimentally. The coherence times that we observe open up encouraging prospects for the use of magnetic nanoribbons in quantum spintronic devices.",
author = "Michael Slota and Ashok Keerthi and Myers, {William K.} and Evgeny Tretyakov and Martin Baumgarten and Arzhang Ardavan and Hatef Sadeghi and Lambert, {Colin J.} and Akimitsu Narita and Klaus M{\"u}llen and Lapo Bogani",
year = "2018",
month = may,
day = "30",
doi = "10.1038/s41586-018-0154-7",
language = "English",
volume = "557",
pages = "691--695",
journal = "Nature",
issn = "0028-0836",
publisher = "Nature Publishing Group",
number = "7707",

}

RIS

TY - JOUR

T1 - Magnetic edge states and coherent manipulation of graphene nanoribbons

AU - Slota, Michael

AU - Keerthi, Ashok

AU - Myers, William K.

AU - Tretyakov, Evgeny

AU - Baumgarten, Martin

AU - Ardavan, Arzhang

AU - Sadeghi, Hatef

AU - Lambert, Colin J.

AU - Narita, Akimitsu

AU - Müllen, Klaus

AU - Bogani, Lapo

PY - 2018/5/30

Y1 - 2018/5/30

N2 - Graphene, a single-layer network of carbon atoms, has outstanding electrical and mechanical properties. Graphene ribbons with nanometre-scale widths (nanoribbons) should exhibit half-metallicity and quantum confinement. Magnetic edges in graphene nanoribbons have been studied extensively from a theoretical standpoint because their coherent manipulation would be a milestone for spintronic and quantum computing devices. 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. 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 spin coherence time is in the range of microseconds at room temperature, and we perform quantum inversion operations between edge and radical spins. Our approach provides a way of testing the theory of magnetism in graphene nanoribbons experimentally. The coherence times that we observe open up encouraging prospects for the use of magnetic nanoribbons in quantum spintronic devices.

AB - Graphene, a single-layer network of carbon atoms, has outstanding electrical and mechanical properties. Graphene ribbons with nanometre-scale widths (nanoribbons) should exhibit half-metallicity and quantum confinement. Magnetic edges in graphene nanoribbons have been studied extensively from a theoretical standpoint because their coherent manipulation would be a milestone for spintronic and quantum computing devices. 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. 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 spin coherence time is in the range of microseconds at room temperature, and we perform quantum inversion operations between edge and radical spins. Our approach provides a way of testing the theory of magnetism in graphene nanoribbons experimentally. The coherence times that we observe open up encouraging prospects for the use of magnetic nanoribbons in quantum spintronic devices.

U2 - 10.1038/s41586-018-0154-7

DO - 10.1038/s41586-018-0154-7

M3 - Journal article

VL - 557

SP - 691

EP - 695

JO - Nature

JF - Nature

SN - 0028-0836

IS - 7707

ER -