Open AccessLocal structure of amorphous tellurium studied by EXAFS
Author(s) -
Ikemoto Hiroyuki,
Miyanaga Takafumi
Publication year - 2014
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577513032748
Subject(s) - tellurium , extended x ray absorption fine structure , chain (unit) , amorphous solid , covalent bond , absorption (acoustics) , crystallography , trigonal crystal system , debye–waller factor , chemistry , coordination number , materials science , absorption spectroscopy , crystal structure , physics , optics , scattering , inorganic chemistry , ion , organic chemistry , astronomy , composite material
The local structure of an amorphous tellurium (a‐Te) film was investigated by extended X‐ray absorption fine‐structure analysis. The covalent bond length shortens and the Debye–Waller factor of the intra‐chain decreases in a‐Te compared with trigonal Te (t‐Te). The value of the intra‐chain coordination number is close to two, which is the value for t‐Te, and the inter‐chain interaction weakens. These results suggest that the primary chain structure remains intact, but the secondary structure is disrupted. The decrease in the inter‐chain interaction strengthens the intra‐chain interaction.