Materials Screening for Disorder-Controlled Chalcogenide Crystals for Phase-Change Memory Applications.

ABSTRACT: Tailoring the degree of disorder in chalcogenide phase-change materials (PCMs) plays an essential role in nonvolatile memory devices and neuro-inspired computing. Upon rapid crystallization from the amorphous phase, the flagship Ge-Sb-Te PCMs form metastable rocksalt-like structures with an unconventionally high concentration of vacancies, which results in disordered crystals exhibiting Anderson-insulating transport behavior. Here, ab initio simulations and transport experiments are combined to extend these concepts to the parent compound of Ge-Sb-Te alloys, viz., binary Sb₂ Te₃ , in the metastable rocksalt-type modification. Then a systematic computational screening over a wide range of homologous, binary and ternary chalcogenides, elucidating the critical factors th

SUBMITTER: Xu Y 

PROVIDER: S-EPMC11468882 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature