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- 1. Phys. Rev. B 75, 085301 (2007) , “Electron backscatter diffraction and electron channeling contrast imaging of tilt and dislocations in nitride thin films”, C. Trager-Cowan, F. Sweeney, P. W. Trimby, A. P. Day, A. Gholinia, N.-H. Schmidt, P. J. Parbrook, A. J. Wilkinson, and I. M. WatsonIn this paper we describe the use of electron backscatter diffraction (EBSD) mapping and electron channeling contrast imaging—in the scanning electron microscope—to study tilt, atomic steps and dislocations in epitaxial GaN thin films. We show results from a series of GaN thin films of... (Read more)
- 2. J. Appl. Phys. 99, 011101 (2006) , “Degradation of hexagonal silicon-carbide-based bipolar devices”, M. Skowronski and S. HaOnly a few years ago, an account of degradation of silicon carbide high-voltage p-i-n diodes was presented at the European Conference on Silicon Carbide and Related Compounds (Kloster Banz, Germany, 2000). This report was followed by the intense effort of multiple groups... (Read more)
- 3. J. Appl. Phys. 92, 889-894 (2002) , “Ramification of micropipes in SiC crystals”, M. Yu. Gutkin, A. G. Sheinerman, T. S. Argunova, J. H. Je, H. S. Kang, Y. Hwu, W.-L. TsaiThe ramification of micropipes is observed using scanning electron microscopy, optical microscopy, and synchrotron x-ray radiography. The conditions for the ramification of dislocated micropipes are determined theoretically within a model when the angles between dislocation lines are small. It is... (Read more)
- 4. J. Appl. Phys. 89, 4625-4630 (2001) , “Hexagonal voids and the formation of micropipes during SiC sublimation growth”, Thomas A. Kuhr, Edward K. Sanchez, Marek Skowronski, William M. Vetter, Michael DudleyHexagonal voids observed in sublimation grown SiC boules were examined using optical microscopy, atomic force microscopy (AFM), scanning electron microscopy, KOH etching, and synchrotron white-beam x-ray topography. Voids formed at imperfections in the attachment layer between the seed and crucible... (Read more)
- 5. Phys. Rev. B 64, 115308 (2001) , “Experimental Investigation of Band Structure Modification in Silicon Nanocrystals”, B. J. Pawlak, T. Gregorkiewicz, C. A. J. Ammerlaan, W. Takkenberg, F. D. Tichelaar, P. F. A. Alkemade.Experimental studies of size-related effects in silicon nanocrystals are reported. We present investigations carried out on nanocrystals prepared from single-crystal Si:P wafer by ball milling. The average final grain dimension varied depending on the way of preparation in the range between 70 and... (Read more)
- 6. Physica B 116, 583-593 (1983) , “Investigations of well defined dislocations in silicon”, H. Alexander, C. Kisielowski-Kemmerich, E. R. WeberThe velocity v of dislocation half-loops introduced into swirl-free floating-zone grown undoped silicon has been measured at 420°C in the resolved shear stress range 30 <τ<300 MPa. Clearly impurity atoms interact with dislocations in this material. Using the starting value of v we found the two types of 60° dislocations, which are distinguished by the sequence of their partials, to have different velocities. Furtheron the velocity depends not only on τ, but also on the elastic strain of the lattice. In the second part the papers review EPR spectroscopy of plastically deformed silicon and collects new results on the activity of dislocations in this material as trapping / recombination centers (decay of photo-EPR, photoluminescence, EBIC microscopy and photoplastic effect). (Read more)
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