Two-dimensional spin systems in PECVD-grown diamond with tunable density
and long coherence for enhanced quantum sensing and simulation
- URL: http://arxiv.org/abs/2211.02282v2
- Date: Wed, 18 Jan 2023 01:17:22 GMT
- Title: Two-dimensional spin systems in PECVD-grown diamond with tunable density
and long coherence for enhanced quantum sensing and simulation
- Authors: Lillian B. Hughes, Zhiran Zhang, Chang Jin, Simon A. Meynell, Bingtian
Ye, Weijie Wu, Zilin Wang, Emily J. Davis, Thomas E. Mates, Norman Y. Yao,
Kunal Mukherjee, and Ania C. Bleszynski Jayich
- Abstract summary: Systems of spins engineered with tunable density and reduced dimensionality enable a number of advancements in quantum sensing and simulation.
We present a refined approach to engineer dense ($gtrsim$1 ppm$cdot$nm), 2D nitrogen and NV layers in diamond.
We observe high (up to 0.74) ratios of P1 to NV centers and reproducibly long NV coherence times, dominated by dipolar interactions with the engineered P1 and NV spin baths.
- Score: 0.844682865957698
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Systems of spins engineered with tunable density and reduced dimensionality
enable a number of advancements in quantum sensing and simulation. Defects in
diamond, such as nitrogen-vacancy (NV) centers and substitutional nitrogen (P1
centers), are particularly promising solid-state platforms to explore. However,
the ability to controllably create coherent, two-dimensional spin systems and
characterize their properties, such as density, depth confinement, and
coherence is an outstanding materials challenge. We present a refined approach
to engineer dense ($\gtrsim$1 ppm$\cdot$nm), 2D nitrogen and NV layers in
diamond using delta-doping during plasma-enhanced chemical vapor deposition
(PECVD) epitaxial growth. We employ both traditional materials techniques, e.g.
secondary ion mass spectrometry (SIMS), alongside NV spin decoherence-based
measurements to characterize the density and dimensionality of the P1 and NV
layers. We find P1 densities of 5-10 ppm$\cdot$nm, NV densities between 1 and
3.5 ppm$\cdot$nm tuned via electron irradiation dosage, and depth confinement
of the spin layer down to 1.6 nm. We also observe high (up to 0.74) ratios of
P1 to NV centers and reproducibly long NV coherence times, dominated by dipolar
interactions with the engineered P1 and NV spin baths.
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