| AVS 60th International Symposium and Exhibition | |
| Graphene and Other 2D Materials Focus Topic | Wednesday Sessions |
| Session GR+AS+EM+NS+SS-WeA |
| Session: | Dopants, Defects and Interfaces in 2D Materials |
| Presenter: | J.E. Rowe, North Carolina State University |
| Authors: | J.E. Rowe, North Carolina State University D.B. Dougherty, North Carolina State University A.A. Sandin, North Carolina State University A. Al-Mahboob, Brookhaven National Laboratory J.T. Sadowski, Brookhaven National Laboratory |
| Correspondent: | Click to Email |
We have conducted a number of experimental measurements of the adsorption system FePc on stepped and unstepped graphene surfaces which may become important for spin-dependent electronics. Our studies were partially conducted using the PEEM beamline as NSLS, the Brookhaven synchrotron facility and we studied epitaxial graphene grown in UHV on 6H and 4H Si surfaces of SiC. In addition, we have measured changes in graphene bands using local area angle-resolved photoemission spectroscopy (ARPES) and normal emission PES for these surfaces both before and after adsorption of Iron Phthalocyanine (FePc). This is to understand the interactions of the FePc as an alternate approach to spin injection into graphene by the use of planar organic molecules as interfacial layers to enhance spin injection. Since weak intermolecular interactions can be comparable in size to molecule-substrate interactions for planar aromatics on graphene, high quality film growth is more likely. We have studied using PEEM. LEEM and STM the growth of iron phthalocyanine (FePc), a chemically-robust paramagnet, on epitaxial graphene on SiC(0001)-Si for the above mentioned surfaces. Ordered monolayer films are obtained on all surfaces with exposure and post-deposition annealing. Stepped surfaces introduces some preferred orientation domain formation as expected. Details of the PES and ARPES studies are discussed as well as LEEM images that clearly show step-flow growth of graphene.