Engineering Boron Vacancy Defects in Boron Nitride Nanotubes

Area of Science:

• Quantum sensing and materials science.
• Exploration of spin defects in low-dimensional nanomaterials.

Background:

• Spin defects in hexagonal boron nitride (hBN) are promising for quantum sensing.
• Negatively charged boron vacancy (V-) centers have been studied in bulk and few-layer hBN.

Purpose of the Study:

• To engineer and investigate V- spin defects within boron nitride nanotubes (BNNTs).
• To explore the unique properties and potential applications of V- spin defects in BNNTs.

Main Methods:

• Engineering of V- spin defects in BNNTs.
• Characterization of spin defect distribution and properties.
• Analysis of spin response to external magnetic fields.

Main Results:

• Successfully engineered V- spin defects distributed along and around BNNTs.
• Observed a directional magnetic field response in BNNT-based spins, unlike in hBN flakes.
• Demonstrated that the tubular geometry of BNNTs facilitates controlled placement of spin defects.

Conclusions:

• BNNTs offer a unique platform for engineering spin defects with directional magnetic sensitivity.
• The controlled placement of spins in BNNTs opens avenues for high-resolution quantum sensing.
• This work supports future optomechanical studies of spin defects in hBN nanomaterials.