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- 1. J. Appl. Phys. 100, 104901 (2006) , “Photoluminescence and photoconductivity in CdTe crystals doped with Bi”, E. Saucedo, C. M. Ruiz, V. Bermúdez, E. Dieguez, E. Gombia, A. Zappettini, A. Baraldi, and N. V. SochinskiiDefect levels in CdTe doped with Bi are studied by low temperature photoluminescence, photoinduced current transient spectroscopy, photoconductivity measurements, and optical absorption. Two centers associated with the doping with Bi are reported. The first one, a deep level located at... (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. Lett. 97, 227401 (2006) , “Optical Detection and Ionization of Donors in Specific Electronic and Nuclear Spin States”, A. Yang, M. Steger, D. Karaiskaj, M. L. W. Thewalt, M. Cardona, K. M. Itoh, H. Riemann, N. V. Abrosimov, M. F. Churbanov, A. V. Gusev, A. D. Bulanov, A. K. Kaliteevskii, O. N. Godisov, P. Becker, H.-J. Pohl, J. W. Ager III, and E. E. HallerWe resolve the remarkably sharp bound exciton transitions of highly enriched 28Si using a single-frequency laser and photoluminescence excitation spectroscopy, as well as photocurrent spectroscopy. Well-resolved doublets in the spectrum of the 31P donor reflect the hyperfine... (Read more)
- 4. J. Vac. Sci. Technol. B 22, 120-125 (2004) , “Properties of Fe-doped semi-insulating GaN structures”, A. Y. Polyakov, N. B. Smirnov, A. V. Govorkov, S. J. PeartonThe properties of semi-insulating GaN films with the lower part of the film doped with Fe are reported. The 300 K sheet resistivity of the films was 2×1010 /square with an activation energy of the dark conductivity of 0.5 eV. The Fermi level is also pinned at... (Read more)
- 5. Phys. Rev. B 65, 85312 (2002) , “Magnetic resonance studies of Mg-doped GaN epitaxial layers grown by organometallic chemical vapor deposition”, E. R. Glaser, W. E. Carlos, G. C. B. Braga, J. A. Freitas Jr, W. J. Moore, B. V. Shanabrook, R.L. Henry, A. E. Wickenden, D. D. Koleske, H.Obloh, P. Kozodoy, S. P. DenBaars, U. K. MishraElectron paramagnetic resonance (EPR) and optically detected magnetic resonance (ODMR) experiments have been performed on a set of GaN epitaxial layers doped with Mg from 2.5×1018 to 5.0×1019 cm-3. The samples were also characterized by secondary-ion-mass... (Read more)
- 6. Mater. Sci. Eng. R 33, 135-207 (2001) , “Comprehensive characterization of hydride VPE grown GaN layers and templates”, H. MorkoƧGaN community has recently recognized that it is imperative that the extended, and point defects in GaN and related materials, and the mechanisms for their formation are understood. This is a first and an important step, which must be followed by defect reduction before full implementation of this... (Read more)
- 7. Physica B 304, 12 (2001) , “Origin of yellow luminescence in n-GaN induced by high-energy 7 MeV electron irradiation”, Yasuhiko Hayashi, Tetsuo Soga, Masayoshi Umeno, Takashi JimboThe yellow luminescence band in high-energy 7 MeV electron-irradiated n-GaN is investigated as a function of electron irradiation dose. Both the yellow-band intensity and the near-bandedge photoluminescence (PL) intensity decrease continually with increasing electron irradiation dose. The decrease... (Read more)
- 8. phys. stat. sol. (b) 221, 625-631 (2000) , “Identification of the Gold-Lithium Defect L1 in Silicon with the Trigonal Centre Au2--(Li+)3 by Electrical, Optical and Magnetic Resonance Spectroscopy”, B. Langhanki, J. M. SpaethN-type silicon doped with gold and lithium was investigated by Electron Paramagnetic Resonance (EPR) and Deep Level Transient Spectroscopy (DLTS), using two sets of samples with different defect concentrations of both gold and lithium. Photoluminescence (PL) on both sets of samples allowed to... (Read more)
- 9. J. Appl. Phys. 74, 5901-5903 (1993) , “The nature of donor conduction in n-GaN”, M. Asif Khan, D. T. Olson, J. N. Kuznia, W. E. Carlos, J. A. Freitas, JrSingle crystal GaN thin films resulting from various deposition techniques are usually dominated by residual donors. To date, the true nature of this donor conduction is not known. Nitrogen vacancies, residual oxygen, and growth defects are cited as potential causes for the residual n-type... (Read more)
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