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Title:

Interacting Weyl Semimetals: Characterization via the Topological Hamiltonian and its Breakdown

Document type:
Zeitschriftenaufsatz
Author(s):
Witczak-Krempa, William; Knap, Michael; Abanin, Dmitry
Abstract:
Weyl semimetals (WSMs) constitute a 3D phase with linearly dispersing Weyl excitations at low energy, which lead to unusual electrodynamic responses and open Fermi arcs on boundaries. We derive a simple criterion to identify and characterize WSMs in an interacting setting using the exact electronic Green’s function at zero frequency, which defines a topological Bloch Hamiltonian. We apply this criterion by numerically analyzing, via cluster and other methods, interacting lattice models with and...     »
Journal title:
Physical Review Letters 2014-09
Year:
2014
Journal volume:
113
Journal issue:
13
Fulltext / DOI:
doi:10.1103/physrevlett.113.136402
Publisher:
American Physical Society (APS)
E-ISSN:
0031-90071079-7114
Date of publication:
25.09.2014
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