Dynamics of Bloch Electrons in Time Dependent External Electric Fields: Bounds for Interband Transitions
arXiv:0709.3456 · doi:10.1088/1751-8113/41/2/025304
Abstract
Using adiabatic expansions formalism, upper bounds for interband transitions for Bloch electrons in slowly varying in time electric fields are obtained. These bounds imply the validity of one-band approximation on long time scales.
12 pages