Andreev reflections on heavy-fermion superconductors.
Andreev reflections on heavy-fermion superconductors.
复制标题
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
中科院分区:
文献类型:
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作者:
De Wilde Y;Heil;Jansen;Wyder;Deltour;Assmus;Menovsky;Sun;Taillefer
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.