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- 1. AIP Conf. Proc. 772, 143 (2005) , American Institute of Physics , “Deep levels in Ruthenium doped p-type MOCVD GaAs”, A. Majid, M. Zafar Iqbal, A. Dadgar, and D. BimbergRuthenium is introduced into GaAs during epitaxial growth by MOCVD. Preliminary results of DLTS investigation of the defect states associated with this 4d transition-metal impurity are reported for the first time. At least three deep levels are identified with Ru in the lower half-bandgap of GaAs at energy positions Ev + 0.38 eV, Ev + 0.52 eV and Ev + 0.65 eV, the last with a relatively higher concentration than the first two. At least one Ru-related deep level is observed in the upper half-bandgap at Ec – 0.66 eV with a significantly high concentration. Emission rate signatures and associated characteristics of all these defect levels are reported. The Ev + 0.65 eV level is found to exhibit an electric field dependent thermal emission characteristic. ©2005 American Institute of Physics (Read more)
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Updated at 2010-07-20 16:50:39
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