Tuesday, June 18, 2013

1305.2414 (Benjamin Béri et al.)

Gauge Dynamics and Topological Insulators    [PDF]

Benjamin Béri, David Tong, Kenny Wong
A non-abelian magnetic field in Yang-Mills theory induces the formation of a "W-boson" vortex lattice. We study the propagation of fundamental fermions in the presence of this lattice in 2+1 dimensions. We show that the spectrum for massless fermions contains four topologically-protected Dirac points with non-zero Bloch momentum. For massive fermions, we compute topological invariants of the band structure and show that it is possible to realise a Z2 topological insulator within Yang-Mills theory.
View original: http://arxiv.org/abs/1305.2414

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