μSR studies of the superconducting order parameter in PuCoGa5

被引:15
作者
Morris, GD
Heffner, RH [1 ]
Bauer, ED
Morales, LA
Sarrao, JL
Fluss, MJ
MacLaughlin, DE
Shu, L
Anderson, JE
机构
[1] Japan Atom Energy Res Inst, Tokai, Ibaraki 3191195, Japan
[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[3] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[4] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA
[5] TRIUMF, Vancouver, BC V6T 2A3, Canada
关键词
plutonium superconductivity; mu SR; penetration depth;
D O I
10.1016/j.physb.2005.11.047
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We present transverse-field (TF) measurements of the in-plane magnetic-field penetration depth),(T) in single-crystalline PuCoGa5 (T-c = 18.5 K) for 0.06 T applied field (approximate to 2 - 5 x H-cl). We find that the temperature dependence of the superfluid density, and therefore Delta lambda(T) = lambda(T) - lambda(0), is proportional to T for T/T-c <= 0.5. We estimate that the measured lambda(0) = 241(3) nm. ZF measurements find no evidence for time-reversal symmetry violation. The ZF and TF measurements are consistent with an even-parity (pseudo-spin singlet), d-wave pairing state. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:180 / 183
页数:4
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