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Magnetic edge states and coherent manipulation of graphene nanoribbons Научная публикация

Журнал Nature
ISSN: 0028-0836 , E-ISSN: 1476-4687
Вых. Данные Год: 2018, Том: 557, Номер: 7707, Страницы: 691-+ Страниц : DOI: 10.1038/s41586-018-0154-7
Авторы Slota Michael 1,2 , Keerthi Ashok 3 , Myers William K. 2 , Tretyakov Evgeny 4 , Baumgarten Martin 3 , Ardavan Arzhang 2,5 , Sadeghi Hatef 6 , Lambert Colin J. 6 , Narita Akimitsu 3 , Muellen Klaus 3 , Bogani Lapo 1,2
Организации
1 (Данные Web of science) Univ Oxford, Dept Mat, Oxford, England
2 (Данные Web of science) Univ Oxford, Ctr Adv ESR, Oxford, England
3 (Данные Web of science) Max Planck Inst Polymer Res, Mainz, Germany
4 (Данные Web of science) NN Vorozhtsov Novosibirsk Inst Organ Chem, Novosibirsk, Russia
5 (Данные Web of science) Univ Oxford, Clarendon Lab, Oxford, England
6 (Данные Web of science) Univ Lancaster, Phys Dept, Quantum Technol Ctr, Lancaster, England

Реферат: Graphene, a single-layer network of carbon atoms, has outstanding electrical and mechanical properties(1). Graphene ribbons with nanometre-scale widths(2,3) (nanoribbons) should exhibit half-metallicity(4) and quantum confinement. Magnetic edges in graphene nanoribbons(5,6) 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 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.
Библиографическая ссылка: Slota M. , Keerthi A. , Myers W.K. , Tretyakov E. , Baumgarten M. , Ardavan A. , Sadeghi H. , Lambert C.J. , Narita A. , Muellen K. , Bogani L.
Magnetic edge states and coherent manipulation of graphene nanoribbons
Nature. 2018. V.557. N7707. P.691-+. DOI: 10.1038/s41586-018-0154-7 WOS Scopus РИНЦ OpenAlex
Файлы: Полный текст от издателя
Даты:
Опубликована в печати: 1 мая 2018 г.
Опубликована online: 30 мая 2018 г.
Идентификаторы БД:
Web of science: WOS:000433412900047
Scopus: 2-s2.0-85048287801
РИНЦ: 41782025
OpenAlex: W2804178337
Цитирование в БД:
БД Цитирований
Web of science 262
Scopus 249
РИНЦ 82
OpenAlex 289
Альметрики: