Anisotropic thermal transport of 2D quasicrystals of decagonal Al-Ni-Co system

M. Matsukawa, M. Yoshizawa, K. Noto, Y. Yokoyama, A. Inoue

Research output: Contribution to journalConference article

11 Citations (Scopus)

Abstract

The anisotropic thermal conductivity of 2D quasicrystals of the decagonal Al-Ni-Co system has been measured over a wide range of temperature. The thermal conductivity value along the periodic axis shows the nearly same behavior as the dirty alloy system. The quasiperiodic thermal conductivity exhibits a typical plateau dependence similar to that of the disordered system. The anisotropic behavior of the measured thermal conductivity is discussed on the basis of phonon relaxation time approximation. The main contributions of phonon scattering processes in the periodic and quasiperiodic directions are phonon-electron interaction and point-defect-like scattering effect arising from Penrose tiling, respectively. A small increase above the plateau region in the quasiperiodic transport indicates hopping conduction of localized vibration modes assisted by phonons such as fracton excitations in the disordered system.

Original languageEnglish
Pages (from-to)146-148
Number of pages3
JournalPhysica B: Condensed Matter
Volume263-264
DOIs
Publication statusPublished - 1999 Mar
Externally publishedYes
EventProceedings of the 1998 9th International Conference on Phonon Scattering in Condensed Matter, PHONONS 98 - Lancaster, Great Britain
Duration: 1998 Jul 261998 Jul 31

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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