A5093537940- High-pressure geophysics and materials
- Atomic and Subatomic Physics Research
- Advanced NMR Techniques and Applications
- Diamond and Carbon-based Materials Research
- Electron Spin Resonance Studies
- Solid-state spectroscopy and crystallography
- Chemical Thermodynamics and Molecular Structure
Tel Aviv University
2023-2025
We investigate nitrogen substitution defects, also known as P1 centers, in type 1b diamonds a source of electron spin polarization that is readily transferred to 13C nuclear spins within the diamond matrix at 14 Tesla by dynamic (DNP) room temperature down 35 K. The goal was obtain quantitative model for clustered centers generated under high pressure and (HPHT). study relied on frequency-stepped measurements DNP profiles magic angle spinning (MAS) using mm-wave output frequency-tunable...
Diamonds have been shown to be an excellent platform for quantum computing and sensing applications. These applications are enabled by the presence of defects in lattice, which also known as color centers. The most common nitrogen-based defect synthetic diamonds is paramagnetic nitrogen substitution (P1) center. While majority rely on nitrogen-vacancy (NV) centers, properties latter heavily influenced spatial distribution P1 Hence, understanding mutual interactions centers crucial successful...
The most common lattice defect in high-pressure high-temperature (HPHT) diamonds is the nitrogen substitution center. This a paramagnetic with single unpaired electron spin coupled to ¹⁴𝑁 nuclear forming an 𝑆 = ½, 𝐼 1 system. While P1 centers have been studied by EPR spectroscopy for decades, only recently did their behavior at ultra-high (> 12 T) magnetic fields become of interest. because were found be very efficient polarizing agents Dynamic Nuclear Polarization (DNP) experiments,...
In this work, we demonstrate the first pulsed electron paramagnetic resonance (EPR) experiments performed under magic angle spinning (MAS) at high magnetic field. Unlike nuclear (NMR) and dynamic polarization (DNP), commonly fields MAS to maximize sensitivity resolution, EPR is usually measured low and, with exception of Spiess group work in late 1990s, never MAS, due great instrumentational challenges. This hampers investigation DNP mechanisms, which spin dynamics play a central role,...
State mixing at a high magnetic field in the well-studied nitrogen substitutions diamonds leads to unique electron spin spectral properties.