“…20,27,28 However, the interstitial atoms are highly mobile and usually stream into a single interstitial void to form nanoclusters, linear defects, or even large precipitates. 21,22,29 For example, dense nanoclusters, edge dislocations, and laminar precipitates are observed in Cu 0.005 PbSe 0.99 Te 0.01 , 30 Cu 0.0045 PbTe 0.75 Se 0.25 , 31 and PbTe/Ag 2 Te 32 compounds, respectively. These defects contribute significantly to reducing κ lat , but also diminish the charge transport properties.…”