论文标题
基于BICH2的超导体CEOBIS1.7SE0.3和PRO0.5F0.5BIS2-XSEX（x = 0，0.3）中的上临界场
The upper critical field in the BiCh2-based superconductors CeOBiS1.7Se0.3 and PrO0.5F0.5BiS2-xSex (x = 0, 0.3)
论文作者
论文摘要
我们报告了基于BICH2的超导体CEOBIS1.7SE0.3和PRO0.5F0.5BIS2-XSEX（x = 0，0.3）中的上临界场（BC2）。使用通量法生长CEOBIS1.7SE0.3和Pro0.5F0.5Bis2-XSEX（x = 0，0.3）的单晶。单晶结构分析表明，室温下的晶体结构为四方（P4/NMM）。通过电阻率和磁化测量值，在所有样品中均观察到大量超导性。对于CEOBIS1.7SE0.3，平面内BC2小于常规轨道极限和Pauli极限，这表明在基于CE的基于CE的相关BICH2化合物中观察到的铁磁有序会影响BC2和超导性。相反，对于Pro0.5F0.5BIS2-XSEX（x = 0，0.3），观察到了高平面内BC2。我们建议，平面内BC2通过反对称自旋轨道耦合增强，这是由于缺乏局部反转对称性而产生的。
We report the upper critical field (Bc2) in the BiCh2-based superconductors CeOBiS1.7Se0.3 and PrO0.5F0.5BiS2-xSex (x = 0, 0.3). Single crystals of CeOBiS1.7Se0.3 and PrO0.5F0.5BiS2-xSex (x = 0, 0.3) were grown using the flux method. Single-crystal structural analysis revealed that the crystal structure at room temperature is tetragonal (P4/nmm). Through electrical resistivity and magnetization measurements, bulk superconductivity was observed in all samples. For CeOBiS1.7Se0.3, the in-plane Bc2 is smaller than the conventional orbital limit and Pauli limit, suggesting that ferromagnetic ordering, which has been observed in a related Ce-containing BiCh2-based compound, affects Bc2 and superconductivity. In contrast, high in-plane Bc2 was observed for PrO0.5F0.5BiS2-xSex (x = 0, 0.3). We propose that the in-plane Bc2 is enhanced by antisymmetric spin-orbit coupling, which arises from the lack of local inversion symmetry.
