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Coherent electrical readout of defect spins in silicon carbide by photo-ionization at ambient conditions
Univ Stuttgart, Germany.
Univ Stuttgart, Germany.
Univ Stuttgart, Germany.
Univ Stuttgart, Germany.
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2019 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 10, article id 5569Article in journal (Refereed) Published
Abstract [en]

Quantum technology relies on proper hardware, enabling coherent quantum state control as well as efficient quantum state readout. In this regard, wide-bandgap semiconductors are an emerging material platform with scalable wafer fabrication methods, hosting several promising spin-active point defects. Conventional readout protocols for defect spins rely on fluorescence detection and are limited by a low photon collection efficiency. Here, we demonstrate a photo-electrical detection technique for electron spins of silicon vacancy ensembles in the 4H polytype of silicon carbide (SiC). Further, we show coherent spin state control, proving that this electrical readout technique enables detection of coherent spin motion. Our readout works at ambient conditions, while other electrical readout approaches are often limited to low temperatures or high magnetic fields. Considering the excellent maturity of SiC electronics with the outstanding coherence properties of SiC defects, the approach presented here holds promises for scalability of future SiC quantum devices.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2019. Vol. 10, article id 5569
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-162950DOI: 10.1038/s41467-019-13545-zISI: 000502061200001PubMedID: 31804489OAI: oai:DiVA.org:liu-162950DiVA, id: diva2:1382356
Note

Funding Agencies|EU (ASTERIQS)European Union (EU); EU (ERC SMeL); BMBF (BrainQSens)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; Volkswagen FoundationVolkswagen; Swedish Research CouncilSwedish Research Council [VR 2016-04068]; Carl Tryggers Stiftelse for Vetenskaplig Forskning [CTS 15:339]; Swedish Energy AgencySwedish Energy Agency [43611-1]; Knut and Alice Wallenberg FoundationKnut & Alice Wallenberg Foundation [KAW 2018.0071]; Korea Institute of Science and Technology institutional programs [2E27231, 2E29580]; Japan Society for the Promotion of Science KAKENHIMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of ScienceGrants-in-Aid for Scientific Research (KAKENHI) [17H01056, 18H03770]

Available from: 2020-01-02 Created: 2020-01-02 Last updated: 2020-02-03

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