Heat capacity studies on rattling vibrations in Ba-TM-Ge type i clathrates

Jingtao Xu, Satoshi Heguri, Yoichi Tanabe, Gang Mu, Jiazhen Wu, Katsumi Tanigaki

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Type I clathrates have a cage structure formed by IV group elements and can encapsulate alkali or rare alkali atoms inside the cages. The potential inside the cages strongly depends on the cage formation and encapsulated atoms. In this paper, we studied the heat capacity of Ba-TM-Ge clathrates. We found that with increase of the disorder in the framework, the lattice constant increases, giving larger free space inside the cages. This change decreases the Einstein energies of the encapsulated atoms and increases the rattling states.

Original languageEnglish
Pages (from-to)1521-1523
Number of pages3
JournalJournal of Physics and Chemistry of Solids
Volume73
Issue number12
DOIs
Publication statusPublished - 2012 Dec

Keywords

  • A. Intermetallic compounds
  • A. Nanostructures
  • D. Anharmonicity
  • D. Specific heat

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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