A single spin in hexagonal boron nitride for vectorial quantum magnetometry

• URL: http://arxiv.org/abs/2408.10348v1
• Date: Mon, 19 Aug 2024 18:40:44 GMT
• Title: A single spin in hexagonal boron nitride for vectorial quantum magnetometry
• Authors: Carmem M. Gilardoni, Simone Eizagirre Barker, Catherine L. Curtin, Stephanie A. Fraser, Oliver. F. J. Powell, Dillon K. Lewis, Xiaoxi Deng, Andrew J. Ramsay, Chi Li, Igor Aharonovich, Hark Hoe Tan, Mete Atatüre, Hannah L. Stern,
• Abstract summary: Quantum sensing based on solid-state spin defects provides a versatile platform for imaging physical properties at the nanoscale. We show that the individually addressable carbon-related spin defect in hexagonal boron nitride is a multi-axis spin system for vectorial nanoscale magnetometry.
• Score: 1.8341141064456064
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum sensing based on solid-state spin defects provides a uniquely versatile platform for imaging physical properties at the nanoscale under diverse environmental conditions. Operation of most sensors used to-date is based on projective measurement along a single axis combined with computational extrapolation. Here, we show that the individually addressable carbon-related spin defect in hexagonal boron nitride is a multi-axis spin system for vectorial nanoscale magnetometry. We demonstrate how its low symmetry and strongly spin-selective direct and reverse intersystem crossing dynamics provide sub-$\mu$T/$\sqrt{\text{Hz}}$ magnetic-field sensitivity for both on and off-axis bias magnetic field exceeding 50 mT. Alongside these features, the room-temperature operation and the nanometer-scale proximity enabled by the van der Waals host material further consolidate this system as an exciting quantum sensing platform.

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