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Emergent magnetism and ferroelectricity in perovskite superlattices
Weng Ya-Kui, Dong Shuai
2018, 38 (5):
181-199.
PDF (6513KB)
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766
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Perovskite transition-metal oxides have many degrees of freedom (e.g., lattice, charge, spin, and
orbital). The couplings and competitions among these degrees of freedom can lead to numerous
novel phenomena, such as high-temperature superconductivity, colossal magnetoresistance,
and multiferroicity, which play important roles in the development of quantum devices. Interestingly,
if two different materials are further coupled with each other, richer physical phenomena
and more controllable performance will be presented through the interfacial lattice and electronic
reconstructions. This review mainly focuses on the physical properties of perovskite superlattices,
including magnetism, ferroelectricity and magnetoelectric coupling. First, several physical
mechanisms associated with magnetic regulation are introduced. Then, hybrid improper ferroelectricity
and electronic ferroelectricity are discussed. Finally, magnetoelectric coupling in perovskite
superlattices is studied and reviewed.
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