Strong Dzyaloshinskii-Moriya Interaction and Origin of Ferroelectricity in Cu2OSeO3

Abstract

By performing density functional calculations, we investigate the origin of the skyrmion state and ferroelectricity in Cu2OSeO3. We find that the Dzyaloshinskii-Moriya interactions between the two different kinds of Cu ions are extremely strong and induce the helical ground state and the skyrmion state in the absence and presence of magnetic field, respectively. On the basis of the general model for the spin-order induced polarization, we propose that the ferroelectric polarization of Cu2OSeO3 in the collinear ferrimagnetic state arises from an unusual mechanism, i.e., the single-spin-site contribution due to the spin-orbit coupling.

References in corpus (8)

• Spin current and magneto-electric effect in non-collinear magnets
• Spontaneous Skyrmion Ground States in Magnetic Metals
• Long wavelength helimagnetic order and skyrmion lattice phase in Cu2OSeO3
• Dual nature of improper ferroelectricity in a magnetoelectric multiferroic
• Spin-Orbit Coupling and Ion Displacements in Multiferroic TbMnO3
• Giant Ferroelectric Polarization of CaMn7O12 Induced by a Combined Effect of Dzyaloshinskii-Moriya Interaction and Exchange Striction
• Ferrimagnetism of the magnetoelectric compound Cu${}_2$OSeO${}_3$ probed by ${}^{77}$Se NMR
• Magnetoelectric effects in single crystals of the cubic ferrimagnetic helimagnet Cu2OSeO3

Cited by in corpus (15)

• Electric field-induced Skyrmion distortion and giant lattice rotation in the magnetoelectric insulator Cu2OSeO3
• The quantum origins of skyrmions and half-skyrmions in Cu2OSeO3
• Magnetoelectric Resonances and Predicted Microwave Diode Effect of Skyrmion Crystal in Multiferroic Chiral-Lattice Magnet
• Criticality and factorization in the Heisenberg chain with Dzyaloshinskii-Moriya interaction
• Thermodynamic evidence of a second skyrmion lattice phase and tilted conical phase in Cu${}_2$0SeO${}_3$
• Establishing the fundamental magnetic interactions in the chiral skyrmionic Mott insulator Cu2OSeO3 by terahertz electron spin resonance
• Mechanisms and origin of multiferroicity
• Exact treatment of magnetism-driven ferroelectricity in the one-dimensional compass model
• Magnetoelectric Behavior from $S=1/2$ Asymmetric Square Cupolas
• Spin excitations in the skymion host Cu2OSeO3
• Helicoidal magnetic structure and ferroelectric polarization in Cu3Nb2O8
• Ferromagnetism and glassiness on the surface of topological insulators
• Antiferromagnetic spin cantings as a driving force of ferroelectricity in multiferroic Cu2OSeO3
• Effects of magnon-magnon interactions in a noncollinear magnet induced by combination of a symmetric and an antisymmetric exchange interaction
• Dzyaloshinskii-Moriya spin density by skew scattering