学術雑誌論文

学術雑誌論文

text

Applied Physics Letters. 2009, 95(1), p. 011902-1-011902-3

Observation of Γ-point phonon frequency in ultrathin metallic films confirmed by ab initio calculation and lattice dynamics

American Institute of Physics

英語

text

2009-07-06

https://doi.org/10.1063/1.3157138

Tanei H., Kusakabe K., Ogi H., et al. "Observation of Γ-point phonon frequency in ultrathin metallic films confirmed by ab initio calculation and lattice dynamics", Applied Physics Letters, 95(1), 011902 (2009) https://doi.org/10.1063/1.3157138.

Vibrations in ultrathin metallic films excited by ultrafast light pulses have been studied based on continuum mechanics. However, this paper shows that they are Γ-point phonon vibrations of plate-phonon modes. Ab initio and lattice dynamics calculations are made to compare Γ-point phonon vibrational frequencies with measurements obtained by the picosecond ultrasound spectroscopy. The standing-wave frequencies of specific Γ-point phonon modes of the slab model show good agreement with measurements without any fitting parameters. This study informs us of a limitation of the continuum-mechanics theory for explaining the mechanics of ultrathin metallic films. © 2009 American Institute of Physics.

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Applied Physics Letters, 95(1), 011902 (2009) and may be found at https://doi.org/10.1063/1.3157138.

84211

Observation of Γ-point phonon frequency in ultrathin metallic films confirmed by ab initio calculation and lattice dynamics

American Institute of Physics

英語

2009-07-06

Applied Physics Letters

95

1

011902-1

011902-3

https://doi.org/10.1063/1.3157138

https://hdl.handle.net/11094/84211