The evolution between Fermi-liquid and non-Fermi-liquid states in correlated electron systems has been a central subject in condensed matter physics because of the coupled intriguing magnetic and electronic states. An effective pathway to explore the nature of non-Fermi-liquid behavior is to approach its phase boundary. Here we report a crossover from non-Fermi-liquid to Fermi-liquid state in metallic ${\mathrm{CaRuO}}_3$ through ionic liquid gating induced protonation with electric field. This electronic transition subsequently triggers a reversible magnetic transition with the emergence of an exotic ferromagnetic state from this paramagnetic compound. Our theoretical analysis reveals that hydrogen incorporation plays a critical role in both the electronic and magnetic phase transitions via structural distortion and electron doping. These observations not only help understand the correlated magnetic and electronic transitions in perovskite ruthenate systems, but also provide novel pathways to design electronic phases in correlated materials.

中文翻译：

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质子嵌入CaRuO3中具有费米液体行为的新兴铁磁性

相关电子系统中费米-液态和非费米-液态之间的演化由于引人入胜的磁态和电子态耦合而成为凝聚态物理学的中心课题。探索非费米液体行为性质的有效途径是接近其非相边界。在这里，我们报告了从非费米液体状态到金属费米液体状态的转换${\mathrm{碳酸钙}}_3$通过离子液体门控在电场中诱导质子化。该电子跃迁随后触发了可逆的磁跃迁，该顺磁化合物出现了奇特的铁磁态。我们的理论分析表明，氢的掺入在通过结构畸变和电子掺杂的电子和磁性相变中都起着至关重要的作用。这些观察结果不仅有助于了解钙钛矿钌酸盐体系中相关的磁和电子跃迁，而且为设计相关材料中的电子相提供了新颖的途径。