Andreev reflections on heavy-fermion superconductors.

Andreev reflections on heavy-fermion superconductors.
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安德烈耶夫对重费米子超导体的思考。

DOI:
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发表时间:
1994
影响因子:
8.6
通讯作者:
Taillefer
Taillefer
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
De Wilde Y;Heil;Jansen;Wyder;Deltour;Assmus;Menovsky;Sun;Taillefer

文献摘要

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在对UPt3、CeCu2Si2和URU2Si2晶体在温度T=30mK和磁场B=10T范围内c面上正常超导点接触的比较安德列夫反射研究中,发现了不同的电流-电压特性。UPt3的微分电阻Dv/Di(V)的行为归因于超导序参数Δ(k^)中节点的存在,并与对态对称性的理论预测进行了比较。CeCu2Si2和URU2Si2的数据表明Δ(k^)中没有零。©1994美国物理学会。
In a comparative Andreev-reflection study of normal-superconductor point contacts on the c plane of UPt3, CeCu2Si2, and URu2Si2 crystals at temperatures down to T=30 mK and in a magnetic field up to B=10 T, differences are found in the current-voltage characteristics. The behavior of the differential resistance dV/dI(V) of UPt3 is attributed to the presence of nodes in the superconducting order parameter Δ(k^) and is compared with theoretical predictions for the symmetry of the pairing state. The data for CeCu2Si2 and URu2Si2 point to the absence of zeros in Δ(k^). © 1994 The American Physical Society.