Isolated spin qubits in SiC with a high-fidelity infrared spin-to-photon interface

David J. Christle, Paul V. Klimov, Charles F. de las Casas, Krisztián Szász, Viktor Ivády, Valdas Jokubavicius, Jawad Ul Hassan, Mikael Syväjärvi, William F. Koehl, Takeshi Ohshima, Nguyen T. Son, Erik Janzén, ádám Gali, David D. Awschalom

Research output: Contribution to journalReview article

70 Citations (Scopus)

Abstract

The divacancies in SiC are a family of paramagnetic defects that show promise for quantum communication technologies due to their long-lived electron spin coherence and their optical addressability at near-telecom wavelengths. Nonetheless, a high-fidelity spin-photon interface, which is a crucial prerequisite for such technologies, has not yet been demonstrated. Here, we demonstrate that such an interface exists in isolated divacancies in epitaxial films of 3C-SiC and 4H-SiC. Our data show that divacancies in 4H-SiC have minimal undesirable spin mixing, and that the optical linewidths in our current sample are already similar to those of recent remote entanglement demonstrations in other systems. Moreover, we find that 3C-SiC divacancies have a millisecond Hahn-echo spin coherence time, which is among the longest measured in a naturally isotopic solid. The presence of defects with these properties in a commercial semiconductor that can be heteroepitaxially grown as a thin film on Si shows promise for future quantum networks based on SiC defects.

Original languageEnglish
Article number021046
JournalPhysical Review X
Volume7
Issue number2
DOIs
Publication statusPublished - Jun 23 2017

Keywords

  • Quantum information
  • Semiconductor physics
  • Spintronics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Christle, D. J., Klimov, P. V., de las Casas, C. F., Szász, K., Ivády, V., Jokubavicius, V., Hassan, J. U., Syväjärvi, M., Koehl, W. F., Ohshima, T., Son, N. T., Janzén, E., Gali, Á., & Awschalom, D. D. (2017). Isolated spin qubits in SiC with a high-fidelity infrared spin-to-photon interface. Physical Review X, 7(2), [021046]. https://doi.org/10.1103/PhysRevX.7.021046