Microwave conductivity and penetration depth in the heavy fermion superconductor CeCoIn5 -: art. no. 047005
Microwave conductivity and penetration depth in the heavy fermion superconductor CeCoIn5 -: art. no. 047005
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DOI：
10.1103/physrevlett.88.047005
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发表时间：
2002-01-28
影响因子：
8.6
通讯作者：
Fisher, IR
中科院分区：
文献类型：
--
作者：
Ormeno, RJ;Sibley, A;Fisher, IR
用微波表面阻抗测量方法研究了准二维重费米子超导体CeCoIn 5在宽微波频率和温度范围内的电动力学性质。我们得出一个值的穿透深度λ（0）类似于190 nm，与一个强的线性项的温度依赖性的λ（T）低于Tc/3，符合超导带隙线节点。电导率的真实的部分在低温下显示出宽峰，这与低于Tc几乎2个数量级的降低的散射率一致。CeCoIn 5具有与高T-c铜酸盐非常相似的性质。
The electrodynamic properties of the quasi-two-dimensional heavy fermion superconductor CeCoIn5 have been investigated by microwave surface impedance measurements over a wide range of microwave frequencies and temperatures. We derive a value penetration depth lambda(0) similar to 190 nm, with a strong linear term in the temperature dependence of lambda(T) below T-c/3, consistent with a superconducting gap with line nodes. The real part of the conductivity displays a broad peak at low temperatures consistent with a decreased scattering rate of almost 2 orders of magnitude below T-c. CeCoIn5 has remarkably similar properties to those of the high-T-c cuprates.