Spin-Orbital Driven Ferroelectricity

Abstract

Proposing a general formulism in terms of local coordinates representing the tilting of the ligands' octahedra, we evaluate the electric polarization in a chain of transition metal ions with unpolar octahedron rotation. We find the orbital ordering produced by the ligands's rotation and the spin order, together, determine the polarization features, manifesting that nonvannishing polarization appears in collinear spin order and the direction of polarization is no more restricted in the plane of spin rotation in cycloidal ordering.

5 pages, 3 figures

References in corpus (11)

• Spin current and magneto-electric effect in non-collinear magnets
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Ferroelectricity in the Magnetic E-Phase of Orthorhombic Perovskites
• Dual nature of improper ferroelectricity in a magnetoelectric multiferroic
• Spin-polarization coupling in multiferroic transition-metal oxides
• Collinear-to-Spiral Spin Transformation without Changing Modulation Wavelength upon Ferroelectric Transition in Tb1-xDyxMnO3
• Electronic Orbital Currents and Polarization in Mott Insulators
• Enhanced ferroelectric polarization by induced Dy spin-order in multiferroic DyMnO3
• Dynamics of Multiferroic Domain Wall in Spin-Cycloidal Ferroelectric DyMnO${}_3$
• Magnetically-induced ferroelectricity in orthorhombic manganites: microscopic origin and chemical trends
• Electrically driven octahedral rotations in SrTiO3 and PbTiO3