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TT: Fachverband Tiefe Temperaturen

TT 89: Disordered Quantum Systems

TT 89.5: Vortrag

Donnerstag, 15. März 2018, 12:30–12:45, HFT-FT 131

Corrections to the self-consistent Born approximation for Weyl fermions — •Andreas Sinner and Klaus Ziegler — Institut für Physik, Theorie II Universität Augsburg Universitätsstr. 1 D-86159, Augsburg, Germany

The average density of states of two- and three-dimensional Weyl fermions is studied in the self-consistent Born approximation (SCBA) and its corrections [1]. The latter have been organized in terms of a 1/N expansion. It turns out that an expansion in terms of the disorder strength is not applicable, as previously mentioned by other authors. Nevertheless, the 1/N expansion provides a justification of the SCBA as the large N limit of Weyl fermions.
A. Sinner, K. Ziegler, Phys. Rev. B 96, 165140 (2017).