单层
材料科学
铁磁性
凝聚态物理
反铁磁性
钝化
相变
铁电性
磁化
过渡金属
克尔效应
光电子学
纳米技术
磁场
化学
非线性系统
物理
电介质
催化作用
生物化学
图层(电子)
量子力学
摘要
Tuning of ferroic phases provides great opportunities for material functionalities, especially in two-dimensional materials. Here, a 4f rare-earth carbide Gd2C monolayer is predicted to be a ferromagnetic metal with large magnetization, inherited from its bulk property. Based on first-principles calculations, we propose a strategy that the surface passivation can effectively tune its ferroicity, namely, switching among ferromagnetic, antiferromagnetic, and ferroelectric phases. Metal–insulator transition also occurs accompanying these ferroic transitions. Our calculation also suggests that the magneto-optic Kerr effect and second harmonic generation are effective methods in monitoring these phase transitions.
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