论文标题
分层超导体LAO0.5F0.5BIS2-XSEX的Grüneisen参数的估计（x = 0.2，0.4，0.6，0.8，1.0）
Estimation of Grüneisen Parameter of Layered Superconductor LaO0.5F0.5BiS2-xSex (x = 0.2, 0.4, 0.6, 0.8, 1.0)
论文作者
论文摘要
研究了基于BICH2的（CH：S，SE，SE）分层超导体LAO0.5F0.5BIS2-XSEX的超导特性和结构参数，包括Grüneisen参数（γG）。超导过渡温度（TC）随着SE浓度（X）的升高而增加，并且通过SE取代诱导大量超导性。当X大于0.4时，γG表现出较大的值，其中改善了超导性能。这些结果表明，在老挝0.5F0.5BIS2-XSEX中，晶格非谐度的增加是可取的。讨论包括相关超导体REO0.5F0.5BIS2（re = pr，nd）的数据，其中SE-POOR样品揭示了γG和TC之间的正相关。此外，特定的热分析表明，LAO0.5F0.5BIS2-XSEX存在低能光学声子模式。
The superconducting properties and structural parameters, including the Grüneisen parameter (γG), of the BiCh2-based (Ch: S, Se) layered superconductor LaO0.5F0.5BiS2-xSex were investigated. The superconducting transition temperature (Tc) increased with increasing Se concentration (x), and bulk superconductivity was induced by Se substitution. γG exhibited a larger value when x greater than 0.4, where the superconducting properties were improved. These results suggest that the increase of lattice anharmonicity is preferable for superconductivity in LaO0.5F0.5BiS2-xSex. The discussion includes data for related superconductors REO0.5F0.5BiS2 (RE = Pr, Nd), where a positive correlation between γG and Tc is revealed for Se-poor samples. In addition, specific heat analyses suggest the presence of a low-energy optical phonon mode for LaO0.5F0.5BiS2-xSex.
