Chemical vapour deposition of graphene on Nk(111) and Co(0001) and intercalation with Au to study Dirac Cone Formation and Rashba splitting

Journal Article · Fri Jan 01 04:00:00 EST 2010 · Diamond and Related Materials

DOI:https://doi.org/10.1016/j.diamond.2010.01.047· OSTI ID:988263

Sanchez-Barriga, J; Vescovo, E; Varykhalov, A; Scholz, M R; Rader, O; Marchenko, D; Rybkin, A

We show in detail monitoring by photoelectron spectroscopy how graphene can be grown by chemical vapor deposition on the transition-metal surfaces Ni(111) and Co(0001) and intercalated by a monoatomic layer of Au. For both systems, a linear E(k) dispersion of massless Dirac fermions appears in the graphene {pi}-band in the vicinity of the Fermi energy. In order to study ferromagnetism and spin-orbit effects by spin- and angle-resolved photoelectron spectroscopy, the sample must be magnetized in remanence. To this end, a W(110) substrate is prepared, its cleanliness verified by photoemission from W(110) surface states and surface core levels, and epitaxial Ni(111) and Co(0001) thin films are grown on top. Spin-resolved photoemission from the {pi}-band shows that the ferromagnetic polarization of graphene/Ni(111) and graphene/Co(0001) is negligible and that graphene on Ni(111) is after intercalation of Au spin-orbit split by the Rashba effect.

• Research Organization: BROOKHAVEN NATIONAL LABORATORY (BNL)
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 988263
• Report Number(s): BNL--93723-2010-JA; KC0204011
• Journal Information: Diamond and Related Materials, Journal Name: Diamond and Related Materials Journal Issue: 7-9 Vol. 19; ISSN 0925-9635
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL VAPOR DEPOSITION
CONES
DEPOSITION
FERMIONS
FERROMAGNETISM
MONITORING
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
POLARIZATION
SPIN
SUBSTRATES
THIN FILMS