Fig. 1: An illustration of the interface engineering method and the proposed charge transfer mechanism.
From: Enhancement of quantum coherence in solid-state qubits via interface engineering
a Schematic showing an NV center near the diamond surface. The surface has unpaired electrons (green arrows) that produce spin noise. At the graphene O-terminated diamond heterojunction, there is less noise fluctuation on the NV center. b An illustration showing how unpaired electrons on the diamond surface cause decoherence on the shallow NV center under an external magnetic field. Upon patching graphene on the O-terminated surface, electrons transfer from graphene towards the diamond surface, pairing up the surface electrons.
