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Area of Science:

  • Quantum technologies
  • Materials science
  • Condensed matter physics

Background:

  • Two-dimensional van der Waals materials offer a platform for quantum technologies.
  • Hexagonal boron nitride (hBN) hosts optically addressable spin defects.
  • Simultaneously addressing multiple spin species in a single material is a key challenge.

Purpose of the Study:

  • To demonstrate the interplay between different spin species in hBN.
  • To reveal the properties of carbon-related spin defects in hBN.
  • To establish hBN as a versatile platform for room-temperature quantum technologies.

Main Methods:

  • Optical spectroscopy
  • Coherent spin control
  • Cross-relaxation measurements
  • Magnetic imaging

Main Results:

  • Demonstrated interplay between S=1 boron vacancy defects and S=1/2 carbon-related electron spins in hBN.
  • Achieved room-temperature coherent control and optical readout of both spin species.
  • Observed cross-relaxation indicating strong inter-species dipolar coupling.
  • Utilized S=1/2 defects for magnetic imaging and probing magnetic anisotropy.

Conclusions:

  • hBN hosts multiple, interacting spin defects suitable for quantum applications.
  • Room-temperature coherent control and readout of different spin species are achievable in hBN.
  • hBN is a promising van der Waals material for developing advanced quantum sensors and simulators.