Sub-nanoscale Temperature, Magnetic Field and Pressure sensing with Spin Centers in 2D hexagonal Boron Nitride

• URL: http://arxiv.org/abs/2102.10890v1
• Date: Mon, 22 Feb 2021 10:52:15 GMT
• Title: Sub-nanoscale Temperature, Magnetic Field and Pressure sensing with Spin Centers in 2D hexagonal Boron Nitride
• Authors: Andreas Gottscholl, Matthias Diez, Victor Soltamov, Christian Kasper, Andreas Sperlich, Mehran Kianinia, Carlo Bradac, Igor Aharonovich and Vladimir Dyakonov
• Abstract summary: We show that negatively charged boron vacancies ($V_B-$) in hexagonal boron nitride (hBN) can be used as atomic scale sensors. These applications are possible due to the high-spin triplet ground state and bright spin-dependent photoluminescence. Our work is important for the future use of spin-rich hBN layers as sensors in heterostructures of functionalized 2D materials.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Spin defects in solid-state materials are strong candidate systems for quantum information technology and sensing applications. Here we explore in details the recently discovered negatively charged boron vacancies ($V_B^-$) in hexagonal boron nitride (hBN) and demonstrate their use as atomic scale sensors for temperature, magnetic fields and externally applied pressure. These applications are possible due to the high-spin triplet ground state and bright spin-dependent photoluminescence (PL) of the $V_B^-$. Specifically, we find that the frequency shift in optically detected magnetic resonance (ODMR) measurements is not only sensitive to static magnetic fields, but also to temperature and pressure changes which we relate to crystal lattice parameters. Our work is important for the future use of spin-rich hBN layers as intrinsic sensors in heterostructures of functionalized 2D materials.

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