Stress-induced splitting and shift of infrared absorption lines of platinum-hydrogen complexes in Si

Kimhiro Sato, Yoichi Kamiura, Takeshi Ishiyama, Yoshifumi Yamashita

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have studied the stress-induced splitting and shift of infrared (IR) absorption lines of platinum-hydrogen complexes in Si by Fourier-transform IR (FT-IR) spectroscopy at 10 K combined with the application of uniaxial stress. We observed several peaks at 1873.0, 1880.7, 1891.8, 1922.3, 1929.9, and 1943.0cm-1. These peaks may be due to the previously observed local vibrational modes (LVMs) of various platinum-hydrogen complexes, that is, the antisymmetric-stretching mode of (Pt-H2)°, the LVM of (Pt-H 1)°, the symmetric-stretching mode of (Pt-H2)°, LVMs of (Pt-H3)- and (Pt-H3)°, and the LVM of an unidentified platinum-hydrogen complex, respectively. The peaks of (Pt-H1)° and (Pt-H2)° split into two components under (100) compressive stress, while those of (Pt-H3)- and (Pt-H3)° did not split. We measured the stress dependence of the two split components of the (Pt-H1)° peak. The low-wavenumber component shifted by -3.2cm-1/GP&, and the high-wavenumber component shifted by 4.2 cm-1/GPa. We show that these wavenumber shifts are equal to the piezospectroscopic tensor elements, A1 and A2, respectively. We propose a structural model of the Pt-H 1 complex, where a hydrogen atom is bonded to one of four Si neighbors of the Pt atom in the {110} mirror plane perpendicular to the (110) symmetric axis with C1h symmetry.

Original languageEnglish
Pages (from-to)4392-4397
Number of pages6
JournalJapanese journal of applied physics
Volume47
Issue number6 PART 1
DOIs
Publication statusPublished - Jun 13 2008

Keywords

  • Hydrogen
  • IR
  • Platinum
  • Si
  • Stress

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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