Off-centering of Pb and Sn impurities in GeTe induced by strong local stress

Alexander I. Lebedev, I. Sluchinskaya, V. N. Demin, I. Munro
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引用次数: 23

Abstract

Noncentrality of large impurity atoms—Pb and Sn atoms—substituting for Ge atoms in a GeTe lattice has been discovered by means of EXAFS investigations in Ge0.9Pb0.1Te and Ge0.85Sn0.15Te samples. The transition of impurity atoms into a noncentral position under conditions of a strong local stress is explained by the participation of an unshared electron pair from the impurity atoms in the formation of the chemical bond.
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强局部应力诱发GeTe中Pb、Sn杂质偏离中心
用EXAFS法在Ge0.9Pb0.1Te和Ge0.85Sn0.15Te样品中发现了大杂质原子pb和Sn取代Ge原子的非中心性。在强局部应力条件下,杂质原子跃迁到非中心位置的原因是来自杂质原子的未共享电子对参与了化学键的形成。
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