Interband coherence response to electric fields in crystals: Berry-phase contributions and disorder effects
Interband coherence response to electric fields in crystals: Berry-phase contributions and disorder effects
In solid state conductors, linear response to a steady electric field is normally dominated by Bloch state occupation number changes that are correlated with group velocity and lead to a steady state current. However, for a number of important physical observables, the most important response even in conductors can be …