Electronic structure and anisotropic transport properties in hexagonal YPtIn and LuAgGe ternary compounds

We present anisotropic, zero applied magnetic field, temperature-dependent resistivity measurements on hexagonal, non-magnetic YPtIn and LuAgGe single crystals. For these materials the in-plane resistivity, ρab, is significantly higher than the c-axis one, ρc, with ρab/ρc∼1.4 for YPtIn and ∼4.2-4.7 for LuAgGe. The connection between the electronic structure and the anisotropic transport properties is discussed using density functional calculations that link the observed anisotropy with a specific shape of Fermi surface and anisotropy of the Fermi velocities