First-order phase transition characteristic of the high temperature metal-semiconductor transition in [Ca2CoO3](0.62)[CoO2]
文献类型：期刊论文
| 作者 | Cheng, Jinguang1; Sui, Yu1,2; Wang, Yang1; Wang, Xianjie1; Su, Wenhui1,2 |
| 刊名 | APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
 |
| 出版日期 | 2009-03-01 |
| 卷号 | 94期号:4页码:911-916 |
| ISSN号 | 0947-8396 |
| DOI | 10.1007/s00339-008-4849-8 |
| 通讯作者 | Sui, Yu(suiyu@hit.edu.cn) |
| 英文摘要 | Transportation and thermodynamic properties of misfit-layered polycrystalline [Ca2CoO3](0.62)[CoO2] were measured in order to clarify the nature of metal- semiconductor transition (MST) at T (MS)a parts per thousand 400 K, above which the simultaneous decrease of resistivity and increase of thermopower with temperature give rise to a great enhancement of thermoelectric power factor up to 1000 K. A first-order phase transition characteristic around T (MS) was revealed by anomalies of resistivity, differential scanning calorimetry, and thermal expansion. The first-order characteristic of the MST can be rationalized from the Virial theorem at an itinerant to localized electron transition in the narrow e (T) band within the [CoO2] plane. Above T (MS), the reduction of the retained delocalized states within the matrix of localized states and the enhancement of charge carrier effective mass with increasing temperature might account for the considerable enhancement of the thermopower. |
| 资助项目 | National Natural Science Foundation of China[50672019] |
| WOS研究方向 | Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000263069700028 |
| 出版者 | SPRINGER |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/99519]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Sui, Yu |
| 作者单位 | 1.Harbin Inst Technol, Ctr Condensed Matter Sci & Technol, Dept Phys, Harbin 150001, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng, Jinguang,Sui, Yu,Wang, Yang,et al. First-order phase transition characteristic of the high temperature metal-semiconductor transition in [Ca2CoO3](0.62)[CoO2][J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING,2009,94(4):911-916. |
| APA | Cheng, Jinguang,Sui, Yu,Wang, Yang,Wang, Xianjie,&Su, Wenhui.(2009).First-order phase transition characteristic of the high temperature metal-semiconductor transition in [Ca2CoO3](0.62)[CoO2].APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING,94(4),911-916. |
| MLA | Cheng, Jinguang,et al."First-order phase transition characteristic of the high temperature metal-semiconductor transition in [Ca2CoO3](0.62)[CoO2]".APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING 94.4(2009):911-916. |
入库方式： OAI收割
来源：金属研究所
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