Thermoelectric figure of merit of anisotropic bulk materials in the presence of polar optical phonon scattering

Kazuma Ikeda, Masanori Matoba

Research output: Contribution to journalArticle


The effect of mass anisotropy on the thermoelectric figure of merit in the presence of polar optical phonon (POP) scattering is numerically studied. Electron transport is considered using the linear Boltzmann transport equation. The mass anisotropy is advantageous for the figure of merit along the principal directions of a small effective mass if phonon thermal conductivity is large. Inelasticity plays an essential role in the obtained result. The result is qualitatively different from that for an ionised impurity model.

Original languageEnglish
Pages (from-to)2189-2191
Number of pages3
JournalJapanese journal of applied physics
Issue number4 PART 1
Publication statusPublished - 2008 Apr 18



  • Anisotropy
  • Effective mass
  • Figure of merit
  • Polar optical phonon
  • Scattering
  • Thermelectric

ASJC Scopus subject areas

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

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