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

Fingerprint

Infrared absorption
infrared absorption
Platinum
vibration mode
platinum
Hydrogen
shift
hydrogen
Stretching
Atoms
hydrogen atoms
Compressive stress
infrared spectroscopy
Fourier transform infrared spectroscopy
Tensors
tensors
mirrors
Mirrors
symmetry
atoms

Keywords

  • Hydrogen
  • IR
  • Platinum
  • Si
  • Stress

ASJC Scopus subject areas

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

Cite this

Stress-induced splitting and shift of infrared absorption lines of platinum-hydrogen complexes in Si. / Sato, Kimhiro; Kamiura, Yoichi; Ishiyama, Takeshi; Yamashita, Yoshifumi.

In: Japanese Journal of Applied Physics, Vol. 47, No. 6 PART 1, 13.06.2008, p. 4392-4397.

Research output: Contribution to journalArticle

Sato, Kimhiro ; Kamiura, Yoichi ; Ishiyama, Takeshi ; Yamashita, Yoshifumi. / Stress-induced splitting and shift of infrared absorption lines of platinum-hydrogen complexes in Si. In: Japanese Journal of Applied Physics. 2008 ; Vol. 47, No. 6 PART 1. pp. 4392-4397.
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AB - 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.

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