Tunable adsorbate-adsorbate interactions on graphene.
We propose a mechanism to control the interaction between adsorbates on graphene. The interaction between a pair of adsorbates--the change in adsorption energy of one adsorbate in the presence of another--is dominated by the interaction mediated by graphene's π electrons and has two distinct regimes. Ab initio density functional, numerical tight-binding, and analytical calculations are used to develop the theory. We demonstrate that the interaction can be tuned in a wide range by adjusting the adsorbate-graphene bonding or the chemical potential.
National Research Council, National Academies, Washington, District of Columbia 20001, USA.
Dmitry
D
Solenov
Chad
C
Junkermeier
Thomas L
TL
Reinecke
Kirill A
KA
Velizhanin