Lattice Distortions in TlInSe2 Thermoelectric Material Studied by X-Ray Absorption Fine Structure

Hosokawa S., Stellhorn J. R., Ikemoto H., Mimura K., Wakita K., MƏMMƏDOV N.

Physica Status Solidi (A) Applications and Materials Science, vol.215, no.1, 2018 (SCI-Expanded, Scopus) identifier

  • Nəşrin Növü: Article / Article
  • Cild: 215 Say: 1
  • Nəşr tarixi: 2018
  • Doi nömrəsi: 10.1002/pssa.201700416
  • jurnalın adı: Physica Status Solidi (A) Applications and Materials Science
  • Jurnalın baxıldığı indekslər: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Açar sözlər: incommensurate-commensurate phase change, local structures, positional fluctuations, thermoelectric materials
  • Açıq Arxiv Kolleksiyası: Məqalə
  • Adres: Bəli

Qısa məlumat

Tl LII and In K X-ray absorption fine structure (XAFS) measurements were performed on a TlInSe2 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.