SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 32: Magnetic Imaging Techniques I

MA 32.6: Vortrag

Mittwoch, 29. März 2023, 16:15–16:30, HSZ 401

Magnetic imaging with spin defects in hexagonal boron nitride — Pawan Kumar¹, Florentin Fabre¹, Alrik Durand¹, Tristan Clua-Provost¹, Jiahan Li², James H. Edgar², Nicolas Rougemaille³, Johann Coraux³, Xavier Marie⁴, Pierre Renucci⁴, Cédric Robert⁴, Isabelle Robert-Philip¹, Bernard Gil¹, Guillaume Cassabois¹, •Aurore Finco¹, and Vincent Jacques¹ — ¹Laboratoire Charles Coulomb, Université de Montpellier, CNRS, Montpellier, France — ²Tim Taylor Department of Chemical Engineering, Kansas State University, Manhattan, Kansas, USA — ³Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, Grenoble, France — ⁴Université de Toulouse, INSA-CNRS-UPS, LPCNO, Toulouse, France

Optically-active spin defects hosted in hexagonal boron nitride (hBN) are promising candidates for the development of a two-dimensional quantum sensing unit. Here, we demonstrate quantitative magnetic imaging with hBN flakes doped with negatively-charged boron-vacancy (VB⁻) centers through neutron irradiation [1]. As a proof-of-concept, we image the magnetic field produced by CrTe2, a van der Waals ferromagnet with a Curie temperature slightly above 300 K. The advantages of the hBN-based magnetic sensor described in this work are its ease of use, high flexibility and, more importantly, its ability to be placed in close proximity to a target sample and included in van der Waals heterostructures.

[1] Kumar et al, arXiv 2207.10477 (2022).