Multigap effect on the heavy-fermion superconductors revealed by thermal conductivity

本文在关联电子系统（包括重费米子系统）上研究了电子关联对多能隙超导性的影响。结果表明，Fe基多能隙超导体Lu_2Fe_3Si_5的热传导增强是由于Fe的3d电子对差距带的主要贡献。此外，在第一个重费米子超导体β-YbAlB_4中还发现了反常的热输运现象，这是非常规量子临界性的一个标志。

Effect of the electronic correlation on the multigap superconductivity has been investigated on the correlated electron system, including the heavy fermion system. The results have revealed the enhanced heat conduction in the Fe-based multigap superconductor Lu_2Fe_3Si_5 due to the dominant contribution of Fe 3d-electrons to the gap bands. Moreover, the anomalous heat transport phenomena as an indication of unconventional quantum criticality has been found in the first heavy-fermion superconductor β-YbAlB_4.