Non-Fermi-liquid nature and exotic thermoelectric power in the heavy-fermion superconductor UBe13

作者：Shimizu Yusei^*; Pourret Alexandre; Knebel Georg; Palacio Morales Alexandra; Aoki Dai

来源：Physical Review B, 2015, 92(24): 241101(R).

DOI：10.1103/PhysRevB.92.241101

We report quite exotic thermoelectric power S in UBe13. At 0 T, the negative S/T continues to strongly enhance down to the superconducting transition temperature with no Fermi-liquid behavior. vertical bar S/T vertical bar is dramatically suppressed and becomes rather modest with increasing field. We have also obtained precise field dependencies of (i) an anomaly in S due to an exotic Kondo effect and (ii) a field-induced anomaly in S/T associated with the anomalous upward H-c2(T). In contrast to the field-sensitive transport property, the normal-state specific heat is magnetically robust, indicating that the largeness of the 5f density of states remains in high fields.

• 出版日期2015-12-2
• 单位中国地震局