Degenerate perturbation theory on a multiorbital Hubbard model shows isotropic superexchange arises mainly from ground-state Kramers doublet hopping while anisotropy comes from excited multiplets, yielding an orbital design rule for quasi-isotropic exchange in rare-earth insulators.
Skyrmion phase and competing magnetic or- ders on a breathing kagom´ e lattice
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Simulations of a square-lattice spin model with bilinear and biquadratic interactions reveal successive field-driven transitions to single-Q, double-Q, and multiple inequivalent quadruple-Q states with distinct phase locking, amplitude distributions, and scalar spin chirality.
Ultrasound in FeGe reveals a field-tunable conical-state fluctuation scale at 35 K and a field-independent CDW scale at 100 K, with magnetic stiffness controlling the acoustic softening.
citing papers explorer
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Design Principles for Quasi-Isotropic Exchange in Rare-Earth Quantum Magnets
Degenerate perturbation theory on a multiorbital Hubbard model shows isotropic superexchange arises mainly from ground-state Kramers doublet hopping while anisotropy comes from excited multiplets, yielding an orbital design rule for quasi-isotropic exchange in rare-earth insulators.
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Field-tunable quadruple-$Q$ states driven by momentum-space frustration
Simulations of a square-lattice spin model with bilinear and biquadratic interactions reveal successive field-driven transitions to single-Q, double-Q, and multiple inequivalent quadruple-Q states with distinct phase locking, amplitude distributions, and scalar spin chirality.
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Magnetoelastic signatures of the conical state and charge density waves in antiferromagnetic FeGe
Ultrasound in FeGe reveals a field-tunable conical-state fluctuation scale at 35 K and a field-independent CDW scale at 100 K, with magnetic stiffness controlling the acoustic softening.