Ferroelectricity induced by cooperative orbital ordering and Peierls instability

被引：9

作者：

Barone, Paolo ^{[1
]}

Picozzi, Silvia ^{[1
]}

机构：

[1] Ist Superconduttori Mat Innovat & Disposit CNR SP, Consiglio Nazl Ric, I-67100 Laquila, Italy

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 21期

关键词：

MULTIFERROICS; POLARIZATION; PHASE;

D O I：

10.1103/PhysRevB.85.214101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A general mechanism by which orbital ordering, coupled to Peierls-like lattice distortions, can induce an electronic switchable polarization is discussed within a model Hamiltonian approach in the context of the modern theory of polarization. By using a Berry-phase approach, a clear picture emerges in terms of Wannier-function centers and orbital occupancies. The proposed mechanism may apply to oxide spinels whose electronic structure has effective one-dimensional character, such as CdV2O4, recently proposed to display multiferroic behavior.

引用

页数：4

共 33 条

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