Superconductivity in CeCO2 nanoparticles

被引：3

作者：

Chen, YY

Jang, SJ

Wang, CR

Yang, HD ^{[1
]}

机构：

[1] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 804, Taiwan

[2] Acad Sinica, Inst Phys, Taipei, Taiwan

[3] Chung Yuan Christian Univ, Ctr Teacher Educ, Chungli, Taiwan

[4] Chung Yuan Christian Univ, Grad Sch Educ, Chungli, Taiwan

[5] Dept Phys, Taichung, Taiwan

来源：

PHYSICA B-CONDENSED MATTER | 2005年 / 359卷

关键词：

superconductivity; Kondo anomaly; nanoparticles;

D O I：

10.1016/j.physb.2005.01.126

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Both Ce and Co are essentially nonmagnetic in Pauli-paramagnetic CeCo2, which undergoes a superconducting transition near 1 K. When made into 58-angstrom nanoparticles, the compound becomes paramagnetic. Meanwhile, based on heat capacity measurements, the nanoparticles remain to be nonsuperconducting down to 0.4 K but exhibit a low-temperature Kondo anomaly with C/T-350mJ/mol K-2 at 0.4 K. Such intriguing effects are consequences of the competition between superconducting gap and electronic spectrum's mean level spacing. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：497 / 499

页数：3