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Te and Cd nuclear-magnetic-resonance study of local structure and bonding in Cd/sub 1-//sub x/Zn/sub x/Te

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
Magic-angle sample-spinning NMR spectra of /sup 111/Cd and /sup 125/Te in Cd/sub 1-//sub x/Zn/sub x/Te semiconductor alloys have been recorded for 0less than or equal toxless than or equal to1. The /sup 111/Cd NMR spectra exhibit a single line whose chemical shift and linewidth depend on x. The linear dependence of the /sup 111/Cd chemical shift on x is assumed to be the result of charge transfer, while the linewidth dependence is shown to be the result of a random distribution of Zn atoms which are next-nearest neighbors to Cd. The /sup 125/Te spectra exhibit multiple lines, their number and chemical shift depending on x. The different chemical shifts of the Te lines are assigned to the five different cation configurations: Cd/sub n/Zn/sub 4-//sub n/, n = 0,...,4: around the Te. The intensities of the experimental Te lines are compared to those in spectral simulations obtained by assuming a random distribution of the cations. The comparison reveals small deviations from a random distribution of the cations. This clustering phenomenon and the effect of the bond-length changes with x on the /sup 125/Te chemical shift are discussed.
Research Organization:
Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
OSTI ID:
6252124
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:12; ISSN PRBMD
Country of Publication:
United States
Language:
English