We study dc conductivity of a Weyl semimetal with uniaxial anisotropy (Fermi velocity ratio $xi= v_bot/v_parallel eq1$) considering the scattering of charge carriers by a wide class of impurity potentials, both short- and long-range. We obtain the ra
tio of transverse and longitudinal (with respect to the anisotropy axis) conductivities as a function of both $xi$ and temperature. We find that the transverse and longitudinal conductivities exhibit different temperature dependence in the case of short-range disorder. For general long-range disorder, the temperature dependence ($sim T^4$) of the conductivity turns out to be insensitive of the anisotropy in the limits of strong ($xigg$ and $ll1$) and weak ($xiapprox1$) anisotropy.
Magnetic materials are usually divided into two classes: those with localised magnetic moments, and those with itinerant charge carriers. We present a comprehensive experimental (spectroscopic ellipsomerty) and theoretical study to demonstrate that t
hese two types of magnetism do not only coexist but complement each other in the Kondo-lattice metal, Tb2PdSi3. In this material the itinerant charge carriers interact with large localised magnetic moments of Tb(4f) states, forming complex magnetic lattices at low temperatures, which we associate with self-organisation of magnetic clusters. The formation of magnetic clusters results in low-energy optical spectral weight shifts, which correspond to opening of the pseudogap in the conduction band of the itinerant charge carriers and development of the low- and high-spin intersite electronic transitions. This phenomenon, driven by self-trapping of electrons by magnetic fluctuations, could be common in correlated metals, including besides Kondo-lattice metals, Fe-based and cuprate superconductors.
