Influence of the crystal field potential on the superconducting properties of PrRU4Sb12

被引：21

作者：

Adroja, DT

Park, JG

Goremychkin, EA

Takeda, N

Ishikawa, M

McEwen, KA

Osborn, R

Hillier, AD

Rainford, BD

机构：

[1] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[2] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea

[3] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[4] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 1068666, Japan

[5] UCL, Dept Phys & Astron, London WC1E 6BT, England

[6] Univ Southampton, Dept Phys, Southampton SO17 1BJ, Hants, England

来源：

PHYSICA B-CONDENSED MATTER | 2005年 / 359卷

关键词：

superconductivity; crystal fields; inelastic neutron scattering;

D O I：

10.1016/j.physb.2005.01.286

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have determined the crystal field potential of the superconductor PrRu(4)Sb(12) (T(c) similar to 0.9 K) using inelastic neutron scattering. The ground state of the Pr(+3) ions in T(h) point group symmetry is a Gamma(1) singlet with a Gamma(5) triplet at an energy of Delta similar to 5.6meV. Comparison with recent results on the PrOs(4)Sb(12) compound, where T(c) similar to 1.85 K and Delta similar to 0.6 meV, supports the conjecture that inelastic quadrupolar fluctuations (or aspherical Coulomb scattering) are responsible for the strong enhancement of T(c). In PrRu(4)Sb(12), the effect is reduced by the higher energy of the first excited level. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：983 / 985

页数：3

共 8 条

[1] Superconductivity and heavy fermion behavior in PrOs4Sb12 -: art. no. 100506 [J].