FM 12-2013 (arXiv:1310.5638)
Authors: Vieri Mastropietro
Title: Interacting Weyl semimetals on a lattice
Abstract:
We perform an exact Renormalization Group analysis of an interacting
Weyl semimetal on a lattice. The existence of a Weyl semimetallic phase,
and
the absence of quantum instabilities
is rigorously proved for interactions not too strong,
even arbitrarily close to the boundary of the semimetallic regime,
where the Fermi points are merging and the Fermi velocity is vanishing.
Relativistic behavior emerges at low energies
and the optical conductivity remains equal to the free value,
with renormalized velocities
replacing by bare ones and up to subdominant
corrections.
Keywords: Weyl semimetals, QED_3+1 on a
lattice
Vieri Mastropietro
Dipartimento di Matematica
Università di Milano
Via Saldini, 50,
I-20133 Milano - ITALY
e-mail: Vieri DOT Mastropietro
AT unimi DOT it