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TT: Fachverband Tiefe Temperaturen

TT 21: Topological Semimetals 1

TT 21.10: Vortrag

Dienstag, 17. März 2020, 12:00–12:15, HSZ 103

Temperature effects on the conductivity of strongly-correlated Dirac semimetals — •Niklas Wagner¹, Sergio Ciuchi², Björn Trauzettel¹, and Giorgio Sangiovanni¹ — ¹Institut für Theoretische Physik und Astrophysik and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, 97074 Würzburg, Germany — ²Department of Physical and Chemical Sciences, University of L’Aquila, Italy

Dirac semimetals can be seen as the three-dimensional generalization of graphene, hosting linearly dispersing bands in the vicinity of a degeneracy point of the bandstructure. We investigate the effects of strong electronic correlations on various Dirac semimetal models by applying Dynamical Mean Field Theory (DMFT), focusing in particular on the finite-temperature crossover regions. By applying Iterated Perturbation Theory (IPT) we have the resolution on the real axis to calculate accurate transport properties. We calculate the conductivity as a function of the temperature and interaction strength and discuss the physical differences with respect to conventional metals.