| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2010-02-02 |
| タイトル |
|
|
タイトル |
Elastic properties of the non-Fermi-liquid metal CeRu4Sb12 and dense Kondo semiconductor CeOs4Sb12 |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 著者 |
Nakanishi, Yoshiki
Kumagai, Tomoyuki
Oikawa, Masafumi
Tanizawa, Tomoaki
Yoshizawa, Masahito
Sugawara, Hitoshi
Sato, Hideyuki
|
| 著者(機関) |
|
|
値 |
Graduate School of Frontier Materials Function Engineering, Iwate University |
| 著者(機関) |
|
|
値 |
Graduate School of Frontier Materials Function Engineering, Iwate University |
| 著者(機関) |
|
|
値 |
Graduate School of Frontier Materials Function Engineering, Iwate University |
| 著者(機関) |
|
|
値 |
Graduate School of Frontier Materials Function Engineering, Iwate University |
| 著者(機関) |
|
|
値 |
Graduate School of Frontier Materials Function Engineering, Iwate University |
| 著者(機関) |
|
|
値 |
Faculty of Integrated Arts and Sciences, The University of Tokushima |
| 著者(機関) |
|
|
値 |
Department of Physics, Tokyo Metropolitan University |
| 登録日 |
|
|
日付 |
2010-02-02 |
| 書誌情報 |
Physical Review B
巻 75,
号 13,
p. 134411-1-134411-8,
発行日 2007-01-01
|
| ISSN |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
1098-0121 |
| Abstract |
|
|
内容記述タイプ |
Other |
|
内容記述 |
We have investigated elastic properties of the Ce-based filled skutterudite antimonides CeRu4Sb12 and CeOs4Sb12 by means of ultrasonic measurements. CeRu4Sb12 shows a slight increase around 130 K in the temperature dependence of the elastic constants C11, (C11−C12)∕2, and C44. No apparent lattice softening toward low temperature expected by a quadrupolar response of the 4f-electronic ground state of the Ce ion was observed at low temperatures. On the other hand, CeOs4Sb12 shows a pronounced lattice softening toward low temperature in the longitudinal C11 as a function of temperature below about 15 K, while a slight lattice softening was observed in the transverse C44 below about 1.5 K, in contrast to no softening in CeRu4Sb12 at low temperatures. Furthermore, CeOs4Sb12 shows a steep drop around a phase-transition temperature of Ts=0.9 K in both C11 and C44. The lattice softening observed in C11 below about 15 K cannot be explained reasonably only by the crystalline electric-field (CEF) effect. Instead, it is most likely to be responsible for a coupling between elastic strain and a relevant renormalized quasiparticle band with a small energy gap in the vicinity of the Fermi level. The elastic properties and the 4f ground state of Ce ions in CeRu4Sb12 and CeOs4Sb12 are discussed in terms of the CEF effect and the band structure in the vicinity of Fermi level. |
| 出版者 |
|
|
出版者 |
American Physical Society |
| 権利 |
|
|
権利情報 |
(c) 2007 The American Physical Society |
| DOI |
|
|
関連タイプ |
isIdenticalTo |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1103/PhysRevB.75.134411 |
| 著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
prb-v75i13p134411.pdf (347.1 kB)
