Observation of an unidentified phonon peak in SiGe alloys and superlattices using molecular dynamics simulation

S. Y.Y. Chung, M. Tomita, R. Yokogawa, A. Ogura, T. Watanabe

研究成果: Conference contribution

4 被引用数 (Scopus)

抄録

Molecular dynamics was applied to a variety of SiGe alloys and superlattice structures in order to investigate the production of an unidentified phonon mode. The mode in question, observed in the resulting phonon dispersion relations, was produced around 2.5 - 5 THz. The corresponding spectral energy density data for the SiGe alloys produced varying intensities around this region, with a higher intensity tending towards lower thermal conductivity values. The unidentified mode was produced by the alloy and the non-periodic superlattice structures, whereas in the case of the periodic superlattices, the mode is less conspicuous. Regarding the SiGe compound, the mode was not produced. It is concluded that the atomic disorder within the alloys and non-periodic superlattices induce a stronger intensity of the unidentified mode.

本文言語English
ホスト出版物のタイトルPRiME 2020
ホスト出版物のサブタイトルSiGe, Ge, and Related Compounds: Materials, Processing, and Devices 9
編集者Q. Liu, J. M. Hartmann, J. R. Holt, X. Gong, V. Jain, G. Niu, G. Masini, A. Ogura, S. Miyazaki, M. Ostling, W. Bi, A. Schulze, A. Mai
出版社IOP Publishing Ltd.
ページ533-546
ページ数14
5
ISBN(電子版)9781607689003
DOI
出版ステータスPublished - 2020
イベントPacific Rim Meeting on Electrochemical and Solid State Science 2020, PRiME 200 - Honolulu, United States
継続期間: 2020 10 42020 10 9

出版物シリーズ

名前ECS Transactions
番号5
98
ISSN(印刷版)1938-6737
ISSN(電子版)1938-5862

Conference

ConferencePacific Rim Meeting on Electrochemical and Solid State Science 2020, PRiME 200
国/地域United States
CityHonolulu
Period20/10/420/10/9

ASJC Scopus subject areas

  • 工学(全般)

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