Journal
NEW JOURNAL OF PHYSICS
Volume 17, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/17/10/103043
Keywords
image-potential states; graphene; metal surfaces; electronic structure
Categories
Funding
- Deutsche Forschungsgemeinschaft through Structure and Dynamics of Internal Interfaces Project [SFB 1083, B6]
Ask authors/readers for more resources
The formation of image-potential states at the interface between a graphene layer and a metal surface is studied by means of model calculations. An analytical one-dimensional model-potential for the combined system is constructed and used to calculate energies and wave functions of the image-potential states at the (Gamma) over bar -point as a function of the graphene-metal distance. It is demonstrated how the double series of image-potential states of freestanding graphene evolves into interfacial states that interact with both surfaces at intermediate distances, and finally into a single series of states resembling those of a clean metal surface covered by a monoatomic spacer layer. The model quantitatively reproduces experimental data available for graphene/Ir(111) and graphene/Ru(0001), systems which strongly differ in interaction strength and therefore adsorption distance. Moreover, it provides a clear physical explanation for the different binding energies and lifetimes of the first (n=1) image-potential state in the valley and hill areas of the strongly corrugated moire superlattice of graphene/Ru(0001).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available