Coherent control of single spins in silicon carbide at room temperature.
By M. Widmann, Sang-Yun Lee, T. Rendler, N. T. Son, H. Fedder, S. Paik, Li‐Ping Yang, N. Zhao, Sen Yang, I. Booker and 8 more. Nature Materials, 2014
614 citations recorded by the source corpus.
Spins in solids are cornerstone elements of quantum spintronics. Leading contenders such as defects in diamond or individual phosphorus dopants in silicon have shown spectacular progress, but either lack established nanotechnology or an efficient spin/photon interface. Silicon carbide (SiC) combines the strength of both systems: it has a large bandgap with deep defects and benefits from mature fabrication techniques. Here, we report the characterization of photoluminescence and optical spin polarization from single silicon vacancies in SiC, and demonstrate that single spins can be addressed at room temperature. We show coherent control of a single defect spin and find long spin coherence times under ambient conditions. Our study provides evidence that SiC is a promising system for atomic-scale spintronics and quantum technology.
Subfields: Electrical and Electronic Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/1dc8e1cb06b40e6d1a3c6b67ade1d2d023dfd6f1
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Citations in the corpus
- Laser writing of coherent colour centres in diamond (2016, background): “The NV colour centre is one of an increasing number of point defects in wide band-gap materials such as diamond and silicon carbide that show promise as quantum light sources and provide an optical interface with coherent electronic and nuclear spins [4-11].”
- Isolated Spin Qubits in SiC with a High-Fidelity Infrared Spin-to-Photon Interface (2017, neutral): “Such a spin-photon interface would require highly spin-selective optical transitions, but only weakly spin-dependent optical readout has been demonstrated in SiC defects thus far [28,31].”
- Material platforms for spin-based photonic quantum technologies (2018, neutral): “are adapted from ReF.(93), Macmillan Publishers Limited.”
- Ultralong Dephasing Times in Solid-State Spin Ensembles via Quantum Control (2018, methodology): “E((2)) |0〉 = ‖〈+1|V|0〉‖2 −E|+1〉 + ‖〈−1|V|0〉‖2 −E|−1〉 =− ( ‖ γNV 2π B⊥‖ 2 D+ γNV 2π Bz + ‖ γNV 2π B⊥‖ 2 D− γNV 2π Bz ) ≈− 2‖ γNV 2π B⊥‖ 2”
- Silicon carbide color centers for quantum applications (2020, methodology): “below previous observation of single saturation rate using electron irradiation [69], [78].”