title: Quantum transport of disordered Weyl semimetals at the nodal point.
abstract: Weyl semimetals are paradigmatic topological gapless phases in three dimensions. We here address the effect of disorder on charge transport in Weyl semimetals. For a single Weyl node with energy at the degeneracy point and without interactions, theory predicts the existence of a critical disorder strength beyond which the density of states takes on a nonzero value. Predictions for the conductivity are divergent, however. In this work, we present a numerical study of transport properties for a disordered Weyl cone at zero energy. For weak disorder, our results are consistent with a renormalization group flow towards an attractive pseudoballistic fixed point with zero conductivity and a scale-independent conductance; for stronger disorder, diffusive behavior is reached. We identify the Fano factor as a signature that discriminates between these two regimes.
authors: Dahlem Center for Complex Quantum Systems and Institut für Theoretische Physik, Freie Universität Berlin, D-14195 Berlin, Germany.
authors: Björn
authors: B
authors: Sbierski
authors: Dahlem Center for Complex Quantum Systems and Institut für Theoretische Physik, Freie Universität Berlin, D-14195 Berlin, Germany.
authors: Gregor
authors: G
authors: Pohl
authors: Dahlem Center for Complex Quantum Systems and Institut für Theoretische Physik, Freie Universität Berlin, D-14195 Berlin, Germany.
authors: Emil J
authors: EJ
authors: Bergholtz
authors: Dahlem Center for Complex Quantum Systems and Institut für Theoretische Physik, Freie Universität Berlin, D-14195 Berlin, Germany.
authors: Piet W
authors: PW
authors: Brouwer