First-principles thermal transport in amorphous Ge₂Sb₂Te₅ at the nanoscale.

The reduction of the thermal conductivity manifests itself as a general feature in disordered chalcogenides, being quite significant (75%) in amorphous Ge 2 Sb 2 Te 5 for sizes below 2 nm, bearing an unavoidable impact on the thermal management of phase-change memories.

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