Gauge fields, quantized fluxes and monopole confinement of the honeycomb lattice

Details Gauge fields, quantized fluxes and monopole confinement of the honeycomb lattice Gauge fields, quantized fluxes and monopole confinement of the honeycomb lattice

2007-09-14

arxiv.org/abs/0709.2213v2

Int.J.Mod.Phys.B23:3113-3130,2009

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 11 figures

Scientific paper

10.1142/S0217979209052972

Electron hopping models on the honeycomb lattice are studied. The lattice consists of two triangular sublattices, and it is non-Bravais. The dual space has non-trivial topology. The gauge fields of Bloch electrons have the U(1) symmetry and thus represent superconducting states in the dual space. Two quantized Abrikosov fluxes exist at the Dirac points and have fluxes $2pi$ and $-2pi$, respectively. We define the non-Abelian SO(3) gauge theory in the extended 3$d$ dual space and it is shown that a monopole and anti-monoplole solution is stable. The SO(3) gauge group is broken down to U(1) at the 2$d$ boundary.The Abrikosov fluxes are related to quantized Hall conductance by the topological expression. Based on this, monopole confinement and deconfinement are discussed in relation to time reversal symmetry and QHE. The Jahn-Teller effect is briefly discussed.

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