Double frustration and magneto-electro-elastic excitations in collinear multiferroic materials

Abstract

We discuss a model scenario for multiferroic systems of type II (collinear spins) where the electric dipolar order competes with a frustrated magnetic order in determining the elastic distortions of the lattice ion positions. High magnetic frustration due to second neighbors exchange and small spin easy-axis anisotropy lead to the appearance of the so called quantum magnetic plateau states. Increasing the magnetic field above the plateau border produces composite excitations, where fractionalized spin tertions arise together with spontaneous dipolar flips (in the form of domain walls) and enhanced localized elastic distortions. This peculiar magneto-electric effect may be described by magneto-electric-elastic (MEE) quasiparticles that could be detected by X-ray and neutron diffraction techniques. Our results are supported by extensive DMRG computations on the spin sector and self-consistent equations for the lattice distortions.

arXiv comment12 pages, 10 figures, supplemental material

References in corpus (21)

• Ferroelectricity in the Magnetic E-Phase of Orthorhombic Perovskites
• Multiferroicity due to charge ordering
• Multiferroic behavior in the new double-perovskite Lu${}_2$MnCoO${}_6$
• Magnetic phase diagram of the S=1/2 antiferromagnetic zigzag spin chain in the strongly frustrated region: cusp and plateau
• CdV2O4: A rare example of a collinear multiferroic spinel
• Magneto-elastic coupling and unconventional magnetic ordering in triangular multiferroic AgCrS2
• NMR imaging of the soliton lattice profile in the spin-Peierls compound CuGeO_3
• Numerical Study of the Incommensurate Phase in Spin-Peierls Systems
• Quantum vs. Classical Magnetization Plateaus of S=1/2 Frustrated Heisenberg Chains
• Fractional S^z excitation and its bound state around the 1/3 plateau of the S=1/2 Ising-like zigzag XXZ chain
• Strong magnetoelectric coupling in mixed ferrimagnetic-multiferroic phases of a double perovskite
• Analysis of magnetization and a spin state crossover in the multiferroic Ca${}_3$Co${}_{2-x}$Mn${}_x$O${}_6$
• Spin-orbit transitions in $\alpha$ and $\gamma$-CoV${}_2$O${}_6$
• Magnetization plateaux induced by a coupling to the lattice
• Double-exchange model study of multiferroic $R$MnO${}_3$ perovskites
• Magnetostriction and ferroelectric state in AgCrS${}_2$
• Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains
• Topological solitons and bulk polarization switch in collinear type II multiferroics
• Microscopic model for magneto-electric coupling through lattice distortions
• Spin-Peierls-like phases in magnetoelastic $J_1-J_2$ antiferromagnetic chain at 1/3 magnetization
• Mixing of magnetic and phononic excitations in incommensurate Spin-Peierls systems

Cited by in corpus (2)

• Exploring magneto-electric coupling through lattice distortions: insights from a pantograph model
• Structural transition, spontaneous formation of strong singlet dimers and metamagnetism in $S=3/2$ magnetoelastic spin chains