5,861 research outputs found

    Heavy-Fermions in a Transition-Metal Compound: LiV2O4LiV_2O_4

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    The recent discovery of heavy-Fermion properties in Lithium Vanadate and the enormous difference in its properties from the properties of Lithium Titanate as well as of the manganite compounds raise some puzzling questions about strongly correlated Fermions. These are disscussed as well as a solution to the puzzles provided.Comment: late

    Landau-Khalatnikov Damping of Ultrasound in Heavy-Fermion Superconductors

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    Chiral spin-order in some purported Kitaev spin-liquid compounds

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    We examine recent magnetic torque measurements in two compounds, γ\gamma-Li2_2IrO3_3 and RuCl3_3, which have been discussed as possible realizations of the Kitaev model. The analysis of the reported discontinuity in torque, as an external magnetic field is rotated across the c−c-axis in both crystals, suggests that they have a translationally-invariant chiral spin-order of the from ≠0 \ne 0 in the ground state and persisting over a very wide range of magnetic field and temperature. An extra-ordinary ∣B∣B2|B|B^2 dependence of the torque for small fields, beside the usual B2B^2 part, is predicted due to the chiral spin-order, and found to be consistent with experiments upon further analysis of the data. Other experiments such as inelastic scattering and thermal Hall effect and several questions raised by the discovery of chiral spin-order, including its topological consequences are discussed.Comment: Clearer figures of the experimental data provided. Also clearer exposition and comment on related recent wor
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