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ID 19278
本文ファイル
著者
Sasakawa, Tetsuya
Suemitsu, Toshiaki
Echizen, Yuji
抄録(英)
We have measured the thermal conductivity of isostructural compounds CePtSn, CeNiSn, CeRhSb, and CeRhAs with the orthorhombic ε-TiNiSi-type structure. It is found that the phonon thermal conductivity is reduced in a systematic way with increasing Kondo temperature TK. The scattering of phonons by valence fluctuations should play a dominant role in such a reduction. The gap formation in the electronic density of states enhances the phonon thermal conductivity significantly in CeRhAs with a gap width of 280 K, while it is weak in CeNiSn or CeRhSb with a pseudogap of 20-30 K. A phenomenological model is proposed for the unusual temperature dependence of phonon thermal conductivity by taking account of the strong dependence of the electron-phonon scattering rate on both TK and the energy gap.
掲載誌名
Physical Review B - Condensed Matter and Materials Physics
66巻
22号
開始ページ
224304-1
終了ページ
224304-6
出版年月日
2002-12-19
出版者
American Physical Society
ISSN
1098-0121
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 2002 The American Physical Society.
関連情報URL
部局名
先端物質科学研究科