Creation of Boron Vacancies in Hexagonal Boron Nitride Exfoliated from Bulk Crystals for Quantum Sensing

Ty Zabelotsky, Sourabh Singh, Galya Haim, Rotem Malkinson, Shima Kadkhodazadeh, Ilya P. Radko, Igor Aharonovich, Hadar Steinberg, Kirstine Berg-Sørensen, Alexander Huck, Takashi Taniguchi, Kenji Watanabe, Nir Bar-Gill*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Boron vacancies (VB-) in hexagonal boron -nitride (hBN) have sparked great interest in recent years due to their optical and spin properties. Since hBN can be readily integrated into devices where it interfaces a huge variety of other 2D materials, boron vacancies may serve as a precise sensor which can be deployed at very close proximity to many important materials systems. Boron vacancy defects may be produced by a number of existing methods, the use of which may depend on the final application. Any method should reproducibly generate defects with controlled density and desired pattern. To date, however, detailed studies of such methods are missing. In this paper, we study various techniques for the preparation of hBN flakes from bulk crystals and relevant postprocessing treatments, namely, focused ion beam (FIB) implantation, for creation of VB-s as a function of flake thickness and defect concentrations. We find that flake thickness plays an important role when optimizing implantation parameters, while careful sample cleaning proved important to achieve consistent results.

Original languageAmerican English
Pages (from-to)21671-21678
Number of pages8
JournalACS Applied Nano Materials
Volume6
Issue number23
DOIs
StatePublished - 8 Dec 2023

Bibliographical note

Publisher Copyright:
© 2023 American Chemical Society.

Keywords

  • boron vacancy defects
  • electron irradiation
  • hBN
  • ion implantation
  • optical spectroscopy
  • spin resonance

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