EuMnO3的压力诱导绝缘体-金属相变
Pressure-induced insulator-metal transition in EuMnO3
摘要：
利用第一性原理计算研究了外压对EuMnO 3电子结构和磁结构的影响。我们发现了一个压力诱导的绝缘体-金属转变，在该转变中，磁序从A型反铁磁到铁磁，并与Jahn-Teller畸变产生强烈的相互作用。此外，我们还发现在高压金属态下，非中心对称的E* 型反铁磁序可以与铁磁基态近似简并。这种情况可以被利用来促进非中心对称（铁电）金属的磁驱动实现。
英文摘要：
We study the influence of external pressure on the electronic and magnetic structure of EuMnO3 from first-principles calculations. We find a pressure-induced insulator-metal transition at which the magnetic order changes from A-type antiferromagnetic to ferromagnetic with a strong interplay with Jahn-Teller distortions. In addition, we find that the non-centrosymmetric E*-type antiferromagnetic order can become nearly degenerate with the ferromagnetic ground state in the high-pressure metallic state. This situation can be exploited to promote a magnetically-driven realization of a non-centrosymmetric (ferroelectric) metal.
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