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Polytype control of spin qubits in silicon carbide
Open accessAbstract
Crystal defects can confine isolated electronic spins and are promising candidates for solid-state quantum information. Alongside research focusing on nitrogen-vacancy centres in diamond, an alternative strategy seeks to identify new spin systems with an expanded set of technological capabilities, a materials-driven approach that could ultimately lead to ‘designer’ spins with tailored properties. Here we show that the 4H, 6H and 3C polytypes of SiC all host coherent and optically addressable defect spin states, including states in all three with room-temperature quantum coherence. The prevalence of this spin coherence shows that crystal polymorphism can be a degree of freedom for engineering spin qubits. Long spin coherence times allow us to use double electron–electron resonance to measure magnetic dipole interactions between spin ensembles in inequivalent lattice sites of the same crystal. Together with the distinct optical and spin transition energies of such inequivalent states, these interactions provide a route to dipole-coupled networks of separately addressable spins. Silicon carbide is a polymorphic material with over 250 known crystal structures. Here the authors show that such polymorphism can be used as a degree of freedom for engineering optically addressable and coherently interacting spin states, including many with room-temperature quantum coherence.
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Metadata
- Authors
- Falk, A. L., Buckley, B. B., Calusine, G., Koehl, W. F., Dobrovitski, V. V., Politi, A., Zorman, C. A., Feng, P. X.-L., & Awschalom, D. D.
- Venue
- Nature Communications
- Published
- 2013-05-07
- Volume
- 4
- Issue
- 1
- Pages
- 1819-1819
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2120609771
- Cited by
- 411
- References
- 22
- FWCI
- 12.43
- Type
- journal article
- Language
- en
- Open access
- hybrid
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