Coherent control and magnetic detection of divacancy spins in silicon carbide at high pressures

Lin Lui, Jun-Feng Wang, Xiao-Di Liu*, Hai-An Xu, Jin-Ming Cui, Qiang Li, Ji-Yang Zhou, Wu-Xi Lin, Zhen-Xuan He, Wan Xu, Yu Wei, Zheng-Hao Liu, Pu Wang, Zhi-He Hao, Jun-Feng Ding, Hai-Ou Li, Wen Liu, Hao Li, Li-Xing You, Jin-Shi Xu*Eugene Gregoryanz, Chuan-Feng Li*, Guang-Can Guo

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

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.
Original languageEnglish
Pages (from-to)9943-9950
Number of pages8
JournalNano Letters
Volume22
Issue number24
Early online date12 Dec 2022
DOIs
Publication statusPublished - 28 Dec 2022

Keywords / Materials (for Non-textual outputs)

  • divacancy
  • high pressure
  • coherent control
  • magnetic detection
  • silicon carbide

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