Journal
NANO LETTERS
Volume 15, Issue 4, Pages 2396-2401Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl504693u
Keywords
Graphene; spin polarization; electronic structure; Dirac cone; spin-resolved ARPES
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Funding
- Saint-Petersburg State University [11.37.634.2013, 11.50.202.2015]
- RFBR [14-02-31150]
- BMBF [05K12OD3]
- ERC Grant Super2D
- University of Basque Country UPV/EHU [GIC07-IT-756-13]
- Departamento de Educacion del Gobierno Vasco
- Spanish Ministerio de Ciencia e Innovacion [TIS2010-19609-C02-01]
- Helmholtz Zentrum Berlin fur Materialien und Energie
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With the discovery and first characterization of graphene, its potential for spintronic applications was recognized immediately. Since then, an active field of research has developed trying to overcome the practical hurdles. One of the most severe challenges is to find appropriate interfaces between graphene and ferromagnetic layers, which are granting efficient injection of spin-polarized electrons. Here, we show that graphene grown under appropriate conditions on Co(0001) demonstrates perfect structural properties and simultaneously exhibits highly spin-polarized charge carriers. The latter was conclusively proven by observation of a single-spin Dirac cone near the Fermi level. This was accomplished experimentally using spin- and angle-resolved photoelectron spectroscopy, and theoretically with density functional calculations. Our results demonstrate that the graphene/Co(0001) system represents an interesting candidate for applications in devices using the spin degree of freedom.
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