Spin-spiral states in undoped manganites

Abstract

The experimental observation of multiferroic behavior in perovskite manganites with a spiral spin structure demands to clarify the origin of these magnetic states and their relation to ferroelectricity. We show that spin-spiral phases with diagonal wavevector and also the E-type phase exist for intermediate values of the Hund's rule and the Jahn-Teller coupling in the orbitally ordered and insulating state of the standard two-band model Hamiltonian for manganites. Our results support the spin-current mechanism for ferroelectricity and present an alternative view to earlier conclusions where frustrating superexchange couplings were crucial to obtain spin-spiral states.

typos fixed, figures 2 and 3 modified

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Cited by in corpus (8)

• Multiferroic materials and magnetoelectric physics: symmetry, entanglement, excitation, and topology
• Theoretical prediction of multiferroicity in double perovskite Y${}_2$NiMnO${}_6$
• Recent Progress of Multiferroic Perovskite Manganites
• Ferroelectricity due to orbital ordering in E-type undoped rare-earth manganites
• Noncollinear and noncoplanar magnetic order in the extended Hubbard model on anisotropic triangular lattice
• Nontrivial topology and localization in the double exchange model with possible applications to perovskite manganites
• A Real Space Description of Magnetic Field Induced Melting in the Charge Ordered Manganites: I. The Clean Limit
• A Real Space Description of Field Induced Melting in the Charge Ordered Manganites: II. the Disordered Case