Temperature dependent nanoscale atomic correlations in Ir 1-xPtxTe2 (x=0.0, 0.03 and 0.04) system

B. Joseph, E. Paris, D. F. Mulato-Gómez, L. Simonelli, M. Bendele, L. Maugeri, A. Iadecola, S. Pyon, K. Kudo, M. Nohara, J. Mustre De Leon, T. Mizokawa, N. L. Saini

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X-ray absorption near-edge structure (XANES) spectroscopy has been used to investigate the unoccupied electronic states and local geometry of Ir 1-xPtxTe2(x=0.0, 0.03 and 0.04) as a function of temperature. The Ir L3-edge absorption white line, as well as high energy XANES features due to the photoelectron multiple scatterings with near neighbours, reveal clear changes in the unoccupied 5d-electronic states and the local geometry with Pt substitution. We find an anomalous spectral weight transfer across the known first-order structural phase transition from the trigonal to monoclinic phase in IrTe2, which characterizes the reduced atomic structure symmetry below the transition temperature. No such changes with temperature are seen in the Pt substituted superconducting samples. In addition, a gradual increase of the spectral weight transfer is observed in IrTe2 with a further decrease in temperature below the transition, indicating that the low temperature phase is likely to have a symmetry lower than the monoclinic one. The results suggest that the interplay between inter-layer and intra-layer atomic correlations should have a significant role in the properties of an Ir1-xPtxTe2 system.

元の言語English
記事番号375702
ジャーナルJournal of Physics Condensed Matter
26
発行部数37
DOI
出版物ステータスPublished - 2014 9 17
外部発表Yes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

フィンガープリント Temperature dependent nanoscale atomic correlations in Ir <sub>1-x</sub>Pt<sub>x</sub>Te<sub>2</sub> (x=0.0, 0.03 and 0.04) system' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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    Joseph, B., Paris, E., Mulato-Gómez, D. F., Simonelli, L., Bendele, M., Maugeri, L., Iadecola, A., Pyon, S., Kudo, K., Nohara, M., Mustre De Leon, J., Mizokawa, T., & Saini, N. L. (2014). Temperature dependent nanoscale atomic correlations in Ir 1-xPtxTe2 (x=0.0, 0.03 and 0.04) system. Journal of Physics Condensed Matter, 26(37), [375702]. https://doi.org/10.1088/0953-8984/26/37/375702