We report that the spin-alignment of interstitial anionic electrons (IAEs) in two-dimensional (2D) interlayer spacing can be tuned by chemical pressure that controls the magnetic properties of 2D electrides. It was clarified from the isovalent Sc substitution on the Y site in the 2D Y₂C electride that the localization degree of IAEs at the interlayer becomes stronger as the unit cell volume and c-axis lattice parameter were systematically reduced by increasing the Sc contents, thus eventually enhancing superparamagnetic behavior originated from the increase in ferromagnetic particle concentration. It was also found that the spin-aligned localized IAEs dominated the electrical conduction of heavily Sc-substituted Y₂C electride. These results indicate that the physcial properties of 2D electrides can be tailored by adjusting the localization of IAEs at interlayer spacing via structural modification that controls the spin instability as found in three-dimensional elemental electrides of pressurized potassium metals.

中文翻译：

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通过化学压力调整二维Y ₂ C电极中间隙电子的自旋对准

我们报告二维（2D）层间间距中的间隙阴离子电子（IAEs）的自旋对齐可以通过控制2D氮化物的磁性的化学压力来调节。从2D Y ₂ C电极的Y位上的等价Sc取代可以看出，通过增加Sc含量有计划地降低单位晶胞体积和c轴晶格参数，中间层中IAE的定位度变得更强，因此最终增强的超顺磁行为源自铁磁颗粒浓度的增加。还发现自旋排列的局部IAE支配了被Sc高度取代的Y _2的电导C选择 这些结果表明，可以通过控制IAP在层间间距处的定位，通过控制加压钾金属的三维元素驻极体中的自旋不稳定性的结构修饰来调节2D驻极体的物理特性。