NQR investigation of crystal structure peculiarities of layered Pbₓ₋₁Cdₓl₂ semiconductors

• Main Authors: Gnatenko, Yu.P., Beinik, I.A., Barabash, A.I., Vertegel, I.G., Chesnokov, E.D., Ovcharenko, A.I., Ivanova, L.S.
• Format: Article
• Language: English
• Published: НТК «Інститут монокристалів» НАН України 2008
• Series: Functional Materials
• Subjects: Characterization and properties
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/134552

The ¹²⁷l NQR spectra of semiconductor mixed crystals Pbₓ₋₁Cdₓl₂ at 77 K have been investigated. It is shown that at low values of Cdl₂ concentration, the intra-layer symmetry of the basic crystal becomes distorted considerably. This occurs due to formation of the intra-layer mechanical strains which are defined by the size difference between the main and impurity atoms (Pb and Cd, respectively). At x>0.10, intra-layer heterophasic two-dimensional Cdl₂ islets have been shown to be formed. The results are discussed that evidence the formation of amorphous glassy phase of the mixed Pbₓ₋₁Cdₓl₂ crystal at x>0.10.