Table 1 Summary of the hBN samples used in this work
From: Multi-species optically addressable spin defects in a van der Waals material
Sample description | Irradiation | Presence of C? defects | Max. ODMR contrast | Sample morphology for measurements |
|---|---|---|---|---|
Nanopowder (Graphene Supermarket) | 2 MeV electrons | High density as purchased | −1.0% (batch 1) | powder film, ~1–10 μm thick (Fig. 1) |
+1.0% (batch 2) | powder film, ~ 1–10 μm thick (Supplementary Fig. 19) | |||
Bulk crystal (HQ Graphene) | 2 MeV electrons | Low density as purchased, high density after irradiation | +0.5% | whole crystal, ~100 μm thick (Fig. 3) |
exfoliated flake, ~1 μm thick (Fig. 2) | ||||
MOVPE film21 | none | High density as grown | +0.5% | film, ≈40 nm thick (Fig. 4) |
