This title appears in the Scientific Report :
2017
Please use the identifier:
http://dx.doi.org/10.1088/2053-1583/aa7ad8 in citations.
Nanostructural origin of giant Rashba effect in intercalated graphene
Nanostructural origin of giant Rashba effect in intercalated graphene
To enhance the spin–orbit interaction in graphene by a proximity effect without compromising the quasi-free-standing dispersion of the Dirac cones means balancing the opposing demands for strong and weak graphene–substrate interaction. So far, only the intercalation of Au under graphene/Ni(1 1 1) ha...
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Personal Name(s): | Krivenkov, M. |
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Golias, E. / Marchenko, D. / Sánchez-Barriga, J. / Bihlmayer, G. / Rader, O. / Varykhalov, A. (Corresponding author) | |
Contributing Institute: |
JARA - HPC; JARA-HPC JARA-FIT; JARA-FIT Quanten-Theorie der Materialien; IAS-1 Quanten-Theorie der Materialien; PGI-1 |
Published in: | 2D Materials, 4 (2017) 3, S. 035010 |
Imprint: |
Bristol
IOP Publ.
2017
|
DOI: |
10.1088/2053-1583/aa7ad8 |
Document Type: |
Journal Article |
Research Program: |
Controlling Spin-Based Phenomena |
Publikationsportal JuSER |
To enhance the spin–orbit interaction in graphene by a proximity effect without compromising the quasi-free-standing dispersion of the Dirac cones means balancing the opposing demands for strong and weak graphene–substrate interaction. So far, only the intercalation of Au under graphene/Ni(1 1 1) has proven successful, which was unexpected since graphene prefers a large separation (~$3.3~{\mathring{\rm A}}$ ) from a Au monolayer in equilibrium. Here, we investigate this system and find the solution in a nanoscale effect. We reveal that the Au largely intercalates as nanoclusters. Our density functional theory calculations show that the graphene is periodically stapled to the Ni substrate, and this attraction presses graphene and Au nanoclusters together. This, in turn, causes a Rashba effect of the giant magnitude observed in experiment. Our findings show that nanopatterning of the substrate can be efficiently used for engineering of spin–orbit effects in graphene. |