Bridgman growth and defect characterization of large diameter mercury indium telluride crystals for near infrared detectors

HRTEM study on the ordered phases in Hg3In2Te6 crystals grown by Bridgman method

“…The analysis shows that the samples are pure disordered MIT phases (PDF number: 65-5765, F4 ¯3m) and no superlattice peaks are found, which is the same as that reported in previous papers. [10][11][12][13][14][15] Seemingly, the samples do not contain ordered phases. However, considering the detection limit of XRD measurements (concentration > 5%), the existence of ordered MIT phases still cannot be ruled out.…”

“…To achieve this goal, ingots are usually cooled from high temperature to low temperature by furnace cooling, to avoid disorder-order phase transformations. The goal was considered to have been realized in many papers, [10][11][12][13][14][15][16] due to the absence of superlattice peaks in X-ray diffraction (XRD) patterns. However, since the detection limit in volume of powder XRD is 5%, the existence of MIT ordered phases cannot be ruled out.…”