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Spin and photophysics of carbon-antisite vacancy defect in 4H silicon carbide: A potential quantum bit
Hungarian Academic Science, Hungary; Eotvos Lorand University, Hungary.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Teoretisk Fysik. Linköpings universitet, Tekniska högskolan. Hungarian Academic Science, Hungary.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Teoretisk Fysik. Linköpings universitet, Tekniska högskolan. National University of Science and Technology MISIS, Russia; Tomsk State University, Russia.
Linköpings universitet, Institutionen för fysik, kemi och biologi, Halvledarmaterial. Linköpings universitet, Tekniska högskolan.
Vise andre og tillknytning
2015 (engelsk)Inngår i: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 91, nr 12, s. 121201-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Silicon carbide with engineered point defects is considered as very promising material for the next generation devices, with applications ranging from electronics and photonics to quantum computing. In this context, we investigate the spin physics of the carbon antisite-vacancy pair that in its positive charge state enables a single photon source. We find by hybrid density functional theory and many-body perturbation theory that the neutral defect possesses a high spin ground state in 4H silicon carbide and provide spin-resonance signatures for its experimental identification. Our results indicate the possibility for the coherent manipulation of the electron spin by optical excitation of this defect at telecom wavelengths, and suggest the defect as a candidate for an alternative solid state quantum bit.

sted, utgiver, år, opplag, sider
American Physical Society , 2015. Vol. 91, nr 12, s. 121201-
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Identifikatorer
URN: urn:nbn:se:liu:diva-116950DOI: 10.1103/PhysRevB.91.121201ISI: 000351038400004OAI: oai:DiVA.org:liu-116950DiVA, id: diva2:802619
Merknad

Funding Agencies|MTA Lendulet program of Hungarian Academy of Sciences; Knut and Alice Wallenberg Foundation; Swedish Foundation for Strategic Research program SRL [10-0026]; SNIC [001/12-275, 2013/1-331]; US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]; Ministry of Education and Science of the Russian Federation [14.Y26.31.0005]; Tomsk State University Academic D. I. Mendeleev Fund Program

Tilgjengelig fra: 2015-04-13 Laget: 2015-04-10 Sist oppdatert: 2017-12-04

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Ivády, ViktorAbrikosov, IgorJanzén, Erik

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