Orbital non-fermi-liquid behavior in cubic ruthenates |
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Authors: | Laad M S Bradarić I Kusmartsev F V |
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Institution: | Department of Physics, Loughborough University, LE11 3TU, United Kingdom. mukul@mpipks-dresden.mpg.de |
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Abstract: | We peruse various anomalous physical responses of the cubic (ferromagnetic SrRuO3 and paramagnetic CaRuO3) ruthenates, such as fractional power-law conductivity, anomalous Raman line shapes, and Hall currents. We show how these exciting power-law observations are naturally described within a new, local (orbital) non-Fermi-liquid state arising from strong, multiorbital Coulomb interactions. Introducing a multiorbital, correlated model treated within the dynamical mean-field theory, we also find two distinct relaxation rates for relaxation of transport in complete agreement with experiment. |
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