Abnormal band bowing effects in phase instability crossover region of GaSe1-xTe x nanomaterials.

ABSTRACT: Akin to the enormous number of discoveries made through traditional semiconductor alloys, alloying selected 2D semiconductors enables engineering of their electronic structure for a wide range of new applications. 2D alloys have been demonstrated when two components crystallized in the same phase, and their bandgaps displayed predictable monotonic variation. By stabilizing previously unobserved compositions and phases of GaSe1-xTe x at nanoscales on GaAs(111), we demonstrate abnormal band bowing effects and phase instability region when components crystallize in different phases. Advanced microscopy and spectroscopy measurements show as tellurium is alloyed into GaSe, nanostructures undergo hexagonal to monoclinic and isotropic to anisotropic transition. There exists an instability region

SUBMITTER: Cai H 

PROVIDER: S-EPMC5953935 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature