2020/10/23 by Andreas Gottscholl, Matthias Diez, Victor Soltamov +6 · 3 citations
Materials Science · Physics and Astronomy · #Boron nitride #Coherence (philosophical gambling strategy) #Coherence time #Coherent control #Context (archaeology) #Diamond and Carbon-based Materials Research #Graphene research and applications #Laser linewidth #Microsecond #Polariton #Quantum and electron transport phenomena #Spin (aerodynamics) #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1126/sciadv.abf3630
published as Science Advances Vol. 7, no. 14, eabf3630 (2021)
arxiv created 2020/10/23 · openalex created_date 2020/10/29 · openalex publication_date 2021/04/02 · arxiv updated 2021/04/06 · openalex updated_date 2026/08/06
Optically active spin defects are promising candidates for solid-state quantum information and sensing applications. To use these defects in quantum applications coherent manipulation of their spin state is required. Here, we realize coherent control of ensembles of boron vacancy centers in hexagonal boron nitride (hBN). Specifically, by applying pulsed spin resonance protocols, we measure a spin-lattice relaxation time of 18 microseconds and a spin coherence time of 2 microseconds at room temperature. The spin-lattice relaxation time increases by three orders of magnitude at cryogenic temperature. By applying a method to decouple the spin state from its inhomogeneous nuclear environment the optically detected magnetic resonance linewidth is substantially reduced to several tens of kilohertz. Our results are important for the employment of van der Waals materials for quantum technologies, specifically in the context of high resolution quantum sensing of two-dimensional heterostructures, nanoscale devices, and emerging atomically thin magnets.