论文标题
SE替换在自载Bich2基于BICH2的复合CEOBIS2-XSEX中诱导的批量超导性
Bulk superconductivity induced by Se substitution in self-doped BiCh2-based compound CeOBiS2-xSex
论文作者
论文摘要
我们报告了SE取代对基于BICH2的复合CEOBIS2-XSEX的晶体结构，超导特性和价状态的影响。合成了X = 0-1.0的多晶CeObis2-XSEX样品。对于X = 0.4和0.6，在磁敏感性测量中观察到具有较大屏蔽体积分数的散装超导过渡。对于X = 0.6，最高的过渡温度（TC）为3.0 K。根据根据电阻率和磁化测量值估算的TC，建立了CEOBIS2-XSEX的超导相图。 CEOBIS2-XSEX中超导性的出现用两个基本化学压力和载体浓度的基本参数进行了解释，这些参数随着SE浓度的增加而系统地改变。
We report the Se substitution effects on the crystal structure, superconducting properties, and valence states of self-doped BiCh2-based compound CeOBiS2-xSex. Polycrystalline CeOBiS2-xSex samples with x = 0-1.0 were synthesized. For x = 0.4 and 0.6, bulk superconducting transitions with a large shielding volume fraction were observed in magnetic susceptibility measurements; the highest transition temperature (Tc) was 3.0 K for x = 0.6. A superconductivity phase diagram of CeOBiS2-xSex was established based on Tc estimated from the electrical resistivity and magnetization measurements. The emergence of superconductivity in CeOBiS2-xSex was explained with two essential parameters of in-plane chemical pressure and carrier concentration, which systematically changed with increasing Se concentration.
