Evidence for multiband superconductivity in the heavy Fermion compound UNi2Al3.
Evidence for multiband superconductivity in the heavy Fermion compound UNi2Al3.
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重费米子化合物 UNi2Al3 中多带超导性的证据。
DOI：
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发表时间：
2004
影响因子：
8.6
通讯作者：
H. Adrian
中科院分区：
文献类型：
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作者：
M. Jourdan;A. Zakharov;Michael Foerster;H. Adrian
研究了重费米子超导体UNi_2Al_3（Tc（max）= 0.98K）的外延薄膜。转变温度Tc取决于电流方向，这可能与超导间隙在不同温度下打开有关。此外，在TN约5 K的磁有序R（T）的影响是强烈的各向异性，表明不同的耦合之间的磁矩和巡回的电荷载流子的多片费米表面。上临界场Hc2（T）表明了一种非常规的自旋单重态超导态。
Epitaxial thin films of the heavy fermion superconductor UNi2Al3 with Tc(max)=0.98 K were investigated. The transition temperature Tc depends on the current direction which can be related to superconducting gaps opening at different temperatures. Also the influence of the magnetic ordering at TN approximately 5 K on R(T) is strongly anisotropic, indicating different coupling between the magnetic moments and itinerant charge carriers on the multisheeted Fermi surface. The upper critical field Hc2(T) suggests an unconventional spin-singlet superconducting state.