Thermally Controlled Charge-Carrier Transitions in Disordered PbSbTe Chalcogenides.

ABSTRACT: Binary and ternary chalcogenides have recently attracted much attention due to their wide range of applications including phase-change memory materials, topological insulators, photonic switches, and thermoelectrics. These applications require a precise control of the number and mobility of charge carriers. Here, an unexpected charge-carrier transition in ternary compounds from the PbTe-Sb₂ Te₃ pseudo-binary line is reported. Upon thermal annealing, sputtered thin films of PbSb₂ Te₄ and Pb₂ Sb₂ Te₅ undergo a transition in the temperature coefficient of resistance and in the type of the majority charge carriers from n-type to p-type. These transitions are observed upon increasing structural order within one crystal

SUBMITTER: Evang V 

PROVIDER: S-EPMC11469063 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature