Effective hydrodynamic field theory and condensation picture of topological insulators
Effective hydrodynamic field theory and condensation picture of topological insulators
While many features of topological band insulators are commonly discussed at the level of single-particle electron wave functions, such as the gapless Dirac boundary spectrum, it remains elusive to develop a hydrodynamic or collective description of fermionic topological band insulators in 3+1 dimensions. As the Chern-Simons theory for the 2+1-dimensional …