Electronic and Magnetic Properties of Quasifreestanding Graphene on Ni
Abstract
For the purpose of recovering the intriguing electronic properties of freestanding graphene at a solid surface, graphene self-organized on a Au monolayer on Ni(111) is prepared and characterized by scanning tunneling microscopy. Angle-resolved photoemission reveals a gapless linear π-band dispersion near Kmacr as a fingerprint of strictly monolayer graphene and a Dirac crossing energy equal to the Fermi energy (EF) within 25 meV meaning charge neutrality. Spin resolution shows a Rashba effect on the π states with a large (∼13meV) spin-orbit splitting up to EF which is independent of k.
- Publication:
-
Physical Review Letters
- Pub Date:
- October 2008
- DOI:
- 10.1103/PhysRevLett.101.157601
- Bibcode:
- 2008PhRvL.101o7601V
- Keywords:
-
- 73.20.At;
- 71.70.Ej;
- 79.60.Dp;
- 81.05.Uw;
- Surface states band structure electron density of states;
- Spin-orbit coupling Zeeman and Stark splitting Jahn-Teller effect;
- Adsorbed layers and thin films;
- Carbon diamond graphite