Dynamical Dzyaloshinsky-Moriya Interaction in KCuF3

Abstract

The spin dynamics of the prototypical quasi one-dimensional antiferromagnetic Heisenberg spin S=1/2 chain KCuF3 is investigated by electron spin resonance spectroscopy. Our analysis shows that the peculiarities of the spin dynamics require a new dynamical form of the antisymmetric anisotropic spin-spin interaction. This dynamical Dzyaloshinsky-Moriya interaction is related to strong oscillations of the bridging fuorine ions perpendicular to the crystallographic c axis. This new mechanism allows to resolve consistently the controversies in observation of the magnetic and structural properties of this orbitally ordered perovskite compound.

4 pages, 3 figures

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Cited by in corpus (16)

• Correlated band theory of spin and orbital contributions to Dzyaloshinskii-Moriya interactions
• Computation of correlation-induced atomic displacements and structural transformations in paramagnetic KCuF3 and LaMnO3
• Optical evidence for symmetry changes above the Neel temperature in KCuF3
• Dynamical mean-field approach to materials with strong electronic correlations
• Two-step stabilization of orbital order and the dynamical frustration of spin in the model charge-transfer insulator KCuF3
• Electron spin resonance in S=1/2 antiferromagnets at high temperature
• Exotic spin orders driven by orbital fluctuations in the Kugel-Khomskii model
• One-dimensional quantum antiferromagnetism in the $p-$orbital CsO${}_2$ compound revealed by electron paramagnetic resonance
• ESR study of the spin ladder with uniform Dzyaloshinskii-Moria interaction
• The incarnation of the Nersesyan-Tsvelik model in (NO)[Cu(NO3)3]
• Spin correlations and Dzyaloshinskii-Moriya interaction in Cs${}_2$CuCl${}_4$
• High-field spectroscopy of singlet-triplet transitions in the spin-dimer systems Sr3Cr2O8 and Ba3Cr2O8
• Electron spin resonance and exchange paths in the orthorhombic dimer system Sr2VO4
• Coupled spin-lattice fluctuations in a compound with orbital degrees of freedom: the Cr based dimer system Sr3Cr2O8
• Inelastic light scattering measurements of a pressure-induced quantum liquid in KCuF${}_3$
• Two-stage evolution of magnetic correlations in spiral spin liquid material, Ca${}_{10}$Cr${}_7$O${}_{28}$