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Donor Complexes Formed by Cu and Zn Multi-Acceptor Impurities in Ge Crystals

机译:Ge晶体中Cu和Zn多受体杂质形成的供体复合物

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摘要

Based on Hall effect measurements it is shown that quenching of complexly doped Ge < Zn,Cu > crystals at 1070-1100 K leads to the formation of additional electrically active donor centers with activation energy E-d = E-c - 93 meV in them. Further annealing of crystals at 550-570 K leads to disappearance of these centers. The most likely model of additional deep donor centers is a complex consisting of a pair of substituent zinc atoms (Zn-s) and interstitial copper atoms (Cu-i). The necessity of taking into account the formation of additional donor centers in precise doping Ge < Zn > crystals with copper by the method of decomposition of supersaturated solution of impurity in matrix is demonstrated.
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