论文标题
基于自载Bich2的超导体CEOBIS1.7SE0.3
Investigation of superconducting properties and possible nematic superconductivity in self-doped BiCh2-based superconductor CeOBiS1.7Se0.3
论文作者
论文摘要
我们通过测量磁化磁性的平面各向异性的测量值研究了基于Bich2的超导性能和可能的nematic超导性。使用通量法生长CEOBIS1.7SE0.3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观察到散装超导性，过渡温度为3.3 K。与其他基于BICH2的超导体相比，对上临界场各向异性的研究表明，晶体中的各向异性相对较低。在CEOBIS1.7SE0.3的超导状态中，观察到了磁倍率的两倍对称面内各向异性，这表明四方结构中的平面内旋转对称性破裂，因此CEOBIS1.7SE0.3。
We investigate the superconducting properties and possible nematic superconductivity of self-doped BiCh2-based (Ch: S, Se) superconductor CeOBiS1.7Se0.3 through the measurements of in-plane anisotropy of magnetoresistance. Single crystals of CeOBiS1.7Se0.3 were grown using a flux method. Single-crystal structural analysis revealed that the crystal structure at room temperature is tetragonal (P4/nmm). Bulk superconductivity with a transition temperature of 3.3 K was observed through electrical resistivity and magnetization measurements. Investigation of anisotropy of upper critical field suggested relatively low anisotropy in the crystal as compared to other BiCh2-based superconductors. In the superconducting states of CeOBiS1.7Se0.3, two-fold symmetric in-plane anisotropy of magnetoresistance was observed, which indicates the in-plane rotational symmetry breaking in the tetragonal structure and hence the possibility of nematic superconductivity in CeOBiS1.7Se0.3.
