论文标题
对BI基层级超导体LA2O2BI3AG0.6SN0.4S6的高压效应对超导特性和晶体结构
High-pressure effects on superconducting properties and crystal structure of Bi-based layered superconductor La2O2Bi3Ag0.6Sn0.4S6
论文作者
论文摘要
压力对具有四层型导电层的BI基分层超导体LA2O2BI3AG0.6SN0.4S6的超导性能的影响已经通过电阻和磁化易感性测量。使用同步加速器X射线衍射在Spring-8时检查压力下的晶体结构。在低压状态下，通过压力诱导左右温度TC的散装超导性，这是由于四方结构的压缩而实现的。在高于6.4 GPA的高压状态下，观察到结构对称性降低，并观察到具有TC〜8 K的超导转变。我们的结果表明，具有两层型和四层型导电层TC中TC必不可少的因素的共同点。
The effects of pressure on the superconducting properties of a Bi-based layered superconductor La2O2Bi3Ag0.6Sn0.4S6, which possesses a four-layer-type conducting layer, have been studied through the electrical resistance and magnetic susceptibility measurements. The crystal structure under pressure was examined using synchrotron X-ray diffraction at SPring-8. In the low-pressure regime, bulk superconductivity with a transition temperature Tc of ~ 4.5 K was induced by pressure, which was achieved by in-plane chemical pressure effect owing to the compression of the tetragonal structure. In the high-pressure regime above 6.4 GPa, a structural symmetry lowering was observed, and superconducting transitions with a Tc ~ 8 K were observed. Our results suggest the possible commonality on the factor essential for Tc in Bi-based superconductors with two-layer-type and four-layer-type conducting layers.
