论文标题
平面内磁性各向异性的两倍对称性在基于BICH2的LAO0.9F0.1BISSE单晶的超导状态中
Two-fold symmetry of in-plane magnetoresistance anisotropy in the superconducting states of BiCh2-based LaO0.9F0.1BiSSe single crystal
论文作者
论文摘要
最近，在基于BICH2的单个晶体（CH：S，SE，SE，SE，SE，SE，SE，SE，SE，SE，SE，SE，SE，SE，SE，SE，SEPORCORES LAOO0.5F0.5BISSE）中，已经观察到了超导性能的两倍对称内部各向异性。该现象与列在列中超导体中观察到的现象非常相似。为了探索基于BICH2的系统中两倍对称各向异性的起源，我们通过检查超导状态中磁磁性的平面内磁性的平面障碍物的平面障碍，以对莱斯0.9f0.1bisse的单个晶体进行高电导状态的磁化状态，从LAO0.9F0.1Bisse的磁倍率的各向异性。 LAO0.9F0.1BISSE获得的结果与LAO0.5F0.5BISSE观察到的结果非常相似，Lao0.5f0.5bisse的电子掺杂浓度高于LAO0.9F0.1BISSE。我们目前的发现表明，超导状态下平面对称性破裂的出现对于一系列LAO1-XFXBISSE中的载体浓度是强大的。
Recently, two-fold symmetric in-plane anisotropy of the superconducting properties have been observed in a single crystal of BiCh2-based (Ch: S, Se) layered superconductor LaO0.5F0.5BiSSe having a tetragonal (four-fold-symmetric) in-plane structure; the phenomena are very similar to those observed in nematic superconductors. To explore the origin of the two-fold symmetric anisotropy in the BiCh2-based system, we have investigated the electron-doping dependence on the anisotropy by examining the in-plane anisotropy of the magnetoresistance in the superconducting states for a single crystal of LaO0.9F0.1BiSSe under high magnetic fields up to 15 T. We observed a two-fold symmetry of in-plane anisotropy of magnetoresistance for LaO0.9F0.1BiSSe. The results obtained for LaO0.9F0.1BiSSe are quite similar to those observed for LaO0.5F0.5BiSSe, which has a higher electron doping concentration than LaO0.9F0.1BiSSe. Our present finding suggests that the emergence of the in-plane symmetry breaking in the superconducting state is robust to the carrier concentration in the series of LaO1-xFxBiSSe.
