Controlling the Electronic Structure of Graphene Using Surface-Adsorbate Interactions
Abstract
Hybridization of atomic orbitals in graphene on Ni(111) opens a large energy gap of ~2.8 eV between non-hybridized states at the K-point. Here we use alkali metal adsorbate to reduce and even eliminate this energy gap, and also identify a mechanism responsible for decoupling graphene from the Ni substrate without intercalation of atomic species underneath graphene. Using angle-resolved photoemission spectroscopy and density functional theory calculations, we show that the energy gap is reduced to 1.3 eV due to moderate decoupling after adsorption of Na on top of graphene.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 21, 2015
- Accession Number
- AD1012007
Entities
People
- Adra V. Carr
- Cong Chen
- Daniel S. Dessau
- David L. Miller
- Guowen Peng
- Henry Kapteyn
- Manos Mavrikakis
- Margaret M. Murnane
- Mark W. Keller
- Piotr Matyba
- Stefan Mathias
Organizations
- University of Wisconsin–Madison