Spin waves and magnetic exchange interactions in the spin ladder compound RbFe${}_2$Se${}_3$

Abstract

We report an inelastic neutron scattering study of the spin waves of the one-dimensional antiferromagnetic spin ladder compound RbFe${}_2$Se${}_3$. The results reveal that the products, $SJ$'s, of the spin $S$ and the magnetic exchange interactions $J$'s along the antiferromagnetic (leg) direction and the ferromagnetic (rung) direction are comparable with those for the stripe ordered phase of the parent compounds of the iron-based superconductors. The universality of the $SJ$'s implies nearly universal spin wave dynamics and the irrelevance of the fermiology for the existence of the stripe antiferromagnetic order among various Fe-based materials.

arXiv comment6 pages, 4 figures

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• Pressure-driven phase transition from antiferromagnetic semiconductor to nonmagnetic metal in two-leg ladders $A$Fe${}_2$$X$${}_3$ ($A$=Ba or K, $X$=S or Se)
• Spin dynamics of the block orbital-selective Mott phase
• Block-spiral magnetism: An exotic type of frustrated order
• Iron telluride ladder compounds: Predicting the structural and magnetic properties of BaFe${}_2$Te${}_3$
• Strong ferromagnetic exchange interaction in the parent state of the superconductivity in BaFe${}_2$S${}_3$
• Magnetic states of iron-based two-leg ladder tellurides
• Emergence of Superconductivity in Doped Multiorbital Hubbard Chains
• Block orbital-selective Mott insulators: a spin excitation analysis
• Prediction of exotic magnetic states in the alkali metal quasi-one-dimensional iron selenide compound Na${}_2$FeSe${}_2$
• Quantum magnetism of iron-based ladders: Blocks, spirals, and spin flux
• Non-superconducting electronic ground state in pressurized BaFe${}_2$S${}_3$ and BaFe${}_2$S${}_{2.5}$Se${}_{0.5}$
• Structural, magnetic, and electronic evolution of the spin-ladder system BaFe${}_2$S${}_{3-x}$Se${}_x$ with isoelectronic substitution
• Purely antiferromagnetic frustrated Heisenberg model in spin ladder compound BaFe${}_2$Se${}_3$
• Coupled Hubbard ladders at weak coupling: Pairing and spin excitations
• Quasi-one-dimensional spin excitations in the iron pnictide NaFe${}_{0.53}$Cu${}_{0.47}$As