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Lattice Distortions in TlInSe 2 Thermoelectric Material Studied by X‐Ray Absorption Fine Structure
Author(s) -
Hosokawa Shinya,
Stellhorn Jens Rüdiger,
Ikemoto Hiroyuki,
Mimura Kojiro,
Wakita Kazuki,
Mamedov Nazim
Publication year - 2018
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201700416
Subject(s) - x ray absorption fine structure , diffraction , thermoelectric effect , materials science , lattice (music) , x ray , atmospheric temperature range , absorption (acoustics) , bond length , analytical chemistry (journal) , crystal structure , chemistry , crystallography , optics , physics , thermodynamics , spectroscopy , quantum mechanics , acoustics , composite material , chromatography
Tl L II and In K X‐ray absorption fine structure (XAFS) measurements were performed on a TlInSe 2 thermoelectric material in the temperature range of 25–300 K including the incommensurate–commensurate phase transition temperature of about 135 K. Most of the bond lengths obtained from the present XAFS measurements are in good agreement with existing X‐ray diffraction data at room temperature, while only the Tl‐Tl correlation shows inconsistent values indicating the commensurate properties of the Tl chains expected from the thermodynamic properties. The present XAFS data clearly support positional fluctuations of the Tl atoms found in three‐dimensional atomic images reconstructed from X‐ray fluorescence holography.[21][S. Hosokawa, 2011]