Abstract
Spin defects in silicon carbide appear to be a promising tool for various quantum
technologies, especially for quantum sensing. However, this technique has been
used only at ambient pressure. Here, by combining this technique with diamond
anvil cell, we systematically study the optical and spin properties of divacancy
defects created at the surface of SiC at pressures up to 40 GPa. The
zero-field-splitting of the divacancy spins increases linearly with pressure as a
slope of 25.1 MHz/GPa, which is almost twice times larger than that of the
nitrogen-vacancy center in diamond. The corresponding pressure sensing
sensitivity is about 0.28 MPa/Hz-1/2. The coherent control of the divacancy
demonstrating that the coherence time decreases as pressure increases. Based on this, the pressure-induced magnetic phase transition of Nd2Fe14B sample at high pressures was detected. These experiments pave the way to use divacancy in quantum technologies such as pressure sensing and magnetic detection at high pressures.
technologies, especially for quantum sensing. However, this technique has been
used only at ambient pressure. Here, by combining this technique with diamond
anvil cell, we systematically study the optical and spin properties of divacancy
defects created at the surface of SiC at pressures up to 40 GPa. The
zero-field-splitting of the divacancy spins increases linearly with pressure as a
slope of 25.1 MHz/GPa, which is almost twice times larger than that of the
nitrogen-vacancy center in diamond. The corresponding pressure sensing
sensitivity is about 0.28 MPa/Hz-1/2. The coherent control of the divacancy
demonstrating that the coherence time decreases as pressure increases. Based on this, the pressure-induced magnetic phase transition of Nd2Fe14B sample at high pressures was detected. These experiments pave the way to use divacancy in quantum technologies such as pressure sensing and magnetic detection at high pressures.
Original language | English |
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Pages (from-to) | 9943-9950 |
Number of pages | 8 |
Journal | Nano Letters |
Volume | 22 |
Issue number | 24 |
Early online date | 12 Dec 2022 |
DOIs | |
Publication status | Published - 28 Dec 2022 |
Keywords / Materials (for Non-textual outputs)
- divacancy
- high pressure
- coherent control
- magnetic detection
- silicon carbide