33 Papers
165 Citations
T. Graf is an academic researcher from Technische Universität München. The author has contributed to research in topics: Electron paramagnetic resonance & Doping. The author has an hindex of 14, co-authored 33 publications. Previous affiliations of T. Graf include Qimonda & Infineon Technologies.
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Papers
g values of effective mass donors in Al x Ga 1 − x N alloys
M. W. Bayerl,Martin S. Brandt,T. Graf,Oliver Ambacher,Jacek A. Majewski,Martin Stutzmann,Donat Josef As,Klaus Lischka +7 more
TL;DR: In this paper, an isotropic g factor of 19475 was obtained for zinc-blende GaN and wurtzite GaN alloys, and the g tensors of the silicon effective mass donor in these materials were determined experimentally.
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•Journal Article
Spin resonance investigations of Mn2+ in wurtzite GaN and AIN films
TL;DR: In this article, high quality Mn-doped GaN and A1N films were investigated with X-band electron spin resonance (ESR) and the observed resonance patterns are well described by the spin Hamiltonian for isolated 5 5 Mn 2 + centers with electronic spin S = 5/2 and nuclear spin I=5/2.
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Doping-level-dependent optical properties of GaN:Mn
O. Gelhausen,Enno Malguth,Matthew R. Phillips,Ewa M. Goldys,Martin Strassburg,Martin Strassburg,Axel Hoffmann,T. Graf,M. Gjukic,Martin Stutzmann +9 more
TL;DR: In this paper, the optical properties of molecular-beam-epitaxy-grown GaN with different Mn-doping levels (5 −23×1019 cm−3) were studied by cathodoluminescence (CL) and optical transmission spectroscopy.
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Investigation of point defects at the high-k oxides/Si(100) interface by electrically detected magnetic resonance
Silvia Baldovino,Silvia Baldovino,S. Nokhrin,Giovanna Scarel,Marco Fanciulli,T. Graf,Martin S. Brandt +6 more
TL;DR: In this paper, the authors used EDMR spectroscopy to investigate the interfaces between Si(1/0/0) and high-k dielectrics Al 2 O 3 and ZrO 2 grown by atomic layer deposition, with or without the native oxide removed.
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Photoconductivity and spin-dependent photoconductivity of hydrosilylated (111) silicon surfaces
TL;DR: In this article, organic monolayers were prepared on hydrogen-terminated (111) silicon surfaces by thermally induced hydrosilylation with alkenes, and the electronic properties of the modified surfaces were studied by photoconductivity and spin-dependent photoconductivities measurements (electrically detected magnetic resonance) and compared to the oxidized and hydrogenterminated silicon surfaces.
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