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          Institute: MPI für Festkörperforschung     Collection: FKF Publikationen 2007     Display Documents

ID: 338928.0, MPI für Festkörperforschung / FKF Publikationen 2007
Can highly enriched 28Si reveal new things about old defects?
Authors:Thewalt, M. L. W.; Steger, M.; Yang, A.; Stavrias, N.; Cardona, M.; Riemann, H.; Abrosimov, N. V.; Churbanov, M. F.; Gusev, A. V.; Bulanov, A. D.; Kovalev, I. D.; Kaliteevskii, A. K.; Godisov, O. N.; Becker, P.; Pohl, H. J.; Ager, J. W.; Haller, E. E.
Date of Publication (YYYY-MM-DD):2007
Title of Journal:Physica B
Start Page:587
End Page:592
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:Recent studies have demonstrated remarkable improvements in the spectroscopy of shallow impurities by using highly enriched Si-28 to eliminate the inhomogeneous isotope broadening inherent in natural Si. Here, we show that similar dramatic improvements in the linewidths of electronic transitions of two well-known deep levels can be achieved in highly enriched 28 Si. New fine structure is revealed in the absorption spectrum of the Se double donor, and one of the transitions of Se+ becomes so sharp that a splitting due to a hyperfine coupling with the I = 1/2 nuclear spin is revealed for 77 Se+. Under an applied magnetic field, the electronic and nuclear spins can be individually determined leading to the possibility of applications in quantum computing. The photoluminescence transitions of the well-known 1014meV Cu-related luminescence center also sharpen dramatically in 28Si, allowing fine structure due to Cu isotope shifts to be resolved. Current models disagree as to whether this center contains one or two Cu atoms, but our results clearly demonstrate the involvement of four Cu atoms. (c) 2007 Elsevier B.V. All rights reserved.
Free Keywords:isotopes; group IV and compounds; experiment; spintronics
External Publication Status:published
Document Type:Article
Communicated by:Michaela Asen-Palmer
Affiliations:MPI für Festkörperforschung
External Affiliations:Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada.; Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia.; Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.; Inst Crystal Growth IKZ, D-12489 Berlin, Germany.; RAS, IChHPS, Nizhnii Novgorod 603000, Russia.; Sci & Tech Ctr Centrotech, St Petersburg 198096, Russia.; PhysTekn Bundenstanstalt Braunschweig, D-38116 Braunschweig, Germany.; VITCON Projectconsult GmbH, D-07743 Jena, Germany.; Univ Calif Berkeley, Berkeley, CA 94720 USA.; LBNL, Berkeley, CA 94720 USA.
Identifiers:ISI:000252041000139 [ID No:1]
ISSN:0921-4526 [ID No:2]
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