Процесс электронного обмена между примесными атомами олова в твердых растворах PbSxSe1–x рассмотрен в рамках микроскопических моделей двухэлектронных центров олова в PbS и PbSe. Показано, что процесс обмена включает перенос одновременно двух электронов с использованием делокализованных состояний валентной зоны.
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