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- 1. Phys. Rev. Lett. 98, 026802 (2007) , “Microscopic Basis for the Mechanism of Carrier Dynamics in an Operating p-n Junction Examined by Using Light-Modulated Scanning Tunneling Spectroscopy”, Shoji Yoshida, Yuya Kanitani, Ryuji Oshima, Yoshitaka Okada, Osamu Takeuchi, and Hidemi ShigekawaThe doping characteristics and carrier transport in a GaAs p-n junction were visualized with a ~10 nm spatial resolution, using light-modulated scanning tunneling spectroscopy. The dynamics of minority carriers under operating conditions, such as recombination, diffusion, and electric... (Read more)
- 2. J. Appl. Phys. 100, 043706 (2006) , “Electrical properties of unintentionally doped semi-insulating and conducting 6H-SiC”, W. C. Mitchel, W. D. Mitchell, Z. Q. Fang, D. C. Look, S. R. Smith, H. E. Smith, Igor Khlebnikov, Y. I. Khlebnikov, C. Basceri, and C. BalkasTemperature dependent Hall effect (TDH), low temperature photoluminescence (LTPL), secondary ion mass spectrometry (SIMS), optical admittance spectroscopy (OAS), and thermally stimulated current (TSC) measurements have been made on 6H-SiC grown by the physical vapor transport technique... (Read more)
- 3. Phys. Rev. B 69, 115210 (2004) , “Optical and magnetic properties of Mn in bulk GaN”, A. Wolos, M. Palczewska, M. Zajac, J. Gosk, M. Kaminska, A. Twardowski, M. Bockowski, I. Grzegory, S. PorowskiWe report results of electron paramagnetic resonance, magnetization, and optical absorption studies of bulk GaN crystals doped with Mn and, for some samples, codoped with Mg acceptor. The experiments performed show that the charge state of the Mn ion in GaN depends on the Fermi level position in the... (Read more)
- 4. Phys. Rev. Lett. 92, 175504 (2004) , “Driving Force of Stacking-Fault Formation in SiC p–i–n Diodes”, S. Ha, M. Skowronski, J. J. Sumakeris, M. J. Paisley, M. K. DasThe driving force of stacking-fault expansion in SiC pin diodes was investigated using optical emission microscopy and transmission electron microscopy. The stacking-fault expansion and properties of the partial dislocations were inconsistent with any stress as the... (Read more)
- 5. Appl. Phys. Lett. 81, 3945 (2002) , “Photoexcitation-electron-paramagnetic-resonance studies of the carbon vacancy in 4H-SiC”, N. T. Son, B. Magnusson, and E. JanzénPhotoexcitation-electron-paramagnetic-resonance (photo-EPR) studies were performed on p-type 4H-SiC irradiated with 2.5 MeV electrons. At W-band frequencies (~95 GHz) different EPR spectra could be well separated, allowing a reliable determination of the ground state levels of the... (Read more)
- 6. Phys. Rev. B 63, 233202 (2001) , “Tetrahedral Mni4 Cluster in Silicon”, J. Wedekind, H. Vollmer, R. Labusch.Mni40 clusters were investigated by electron paramagnetic resonance in silicon specimens with initial doping concentrations between 1.5×1015?P cm-3 and 5×1016?B cm-3. In n-type samples and in intrinsic samples, we obtained the EPR... (Read more)
- 7. Phys. Rev. B 61, 1918 (2000) , “EPR investigation of manganese clusters in silicon”, J. Martin, J. Wedekind, H. Vollmer, and R. LabuschManganese centers were investigated in silicon specimens with initial doping concentrations between 1.5×1015 P cm-3 and 6×1015 B cm-3. All known Mn centers could be observed but the cluster Mni3Mni was missing in highly-boron-doped... (Read more)
- 8. phys. stat. sol. (a) 162, 95-151 (1997) , “EPR and ENDOR Investigations of Shallow Impurities in SiC Polytypes”, S. Greulich-WeberInvestigations of nitrogen donors in 6H-, 4H- and 3C-SiC using conventional electron paramagnetic resonance (EPR), electron nuclear double resonance (ENDOR) and optical detection of EPR and ENDOR as well as optical absorption and emission spectroscopy are reviewed and critically discussed. An... (Read more)
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