Vibrational-mechanical properties of the highly-mismatched Cd_1-xBe_xTe semiconductor alloy: experiment and ab initio calculations.

ABSTRACT: The emerging CdTe-BeTe semiconductor alloy that exhibits a dramatic mismatch in bond covalency and bond stiffness clarifying its vibrational-mechanical properties is used as a benchmark to test the limits of the percolation model (PM) worked out to explain the complex Raman spectra of the related but less contrasted Zn_1-xBe_x-chalcogenides. The test is done by way of experiment ([Formula: see text]), combining Raman scattering with X-ray diffraction at high pressure, and ab initio calculations ([Formula: see text] ~ 0-0.5; [Formula: see text]~1). The (macroscopic) bulk modulus [Formula: see text] drops below the CdTe value on minor Be incorporation, at variance with a linear [Formula: see text] versus [Formula: see text] increase predicted ab initio, thus hinting at la

SUBMITTER: Elmahjoubi A 

PROVIDER: S-EPMC10477277 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature