Berlin 2012 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 93: Poster Session: Metal-Semiconductor Hybrid Systems, Plasmonic Systems / Photonic Crystals / Carbon: Diamond & CNT / Quantum Information Systems
HL 93.22: Poster
Donnerstag, 29. März 2012, 16:00–19:00, Poster D
Broad-band electrically detected magnetic resonance experiments and electroelastic hyperfine tuning of phosphorus donors in silicon — •Florian M. Hrubesch1, Lukas Dreher1, Timon A. Hilker1, Andreas Brandlmaier2, Sebastian T.B. Goennenwein2, Hans Huebl2, Martin Stutzmann1, and Martin S. Brandt1 — 1Walter Schottky Institut, Technische Universität München, Am Coulombwall 4, 85748 Garching — 2Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meißner-Strasse 8, 85748 Garching
We performed broad-band electrically-detected magnetic resonance (EDMR) experiments of 31P in Si using short-circuited coplanar strip lines (CPS) for on-chip microwave magnetic field generation. With this approach, EDMR measurements with frequencies from 1-20 GHz are possible, demonstrating a cost effective way of performing multi-frequency experiments. Using the CPS technique, we demonstrate the electroelastical control of the hyperfine interaction between phosphorus nuclear and electronic spins opening an effective way to address spin-based qubits [1]. The hyperfine interaction is measured employing a hybrid structure consisting of a Si:P layer, a SiGe virtual substrate, and a piezoelectric actuator. By applying a voltage to the actuator, the hyperfine interaction is changed by up to 0.9 MHz, demonstrating the feasibility of electroelastic hyperfine tuning.
[1] L. Dreher, et al. Phys. Rev. Lett. 106, 037601 (2011)
Funding: DFG via SFB 631, C3