The Description of Charge Carriers Fluxes Propagation Behind Frameworks of the Usual Relaxation Time
Quasi-particles. Statement of a boundary-value problem of joint propagation of quasi-particles differential fluxes and transport of energy by them in structure with thin layers discussed. Expressions of «arrival» to a state with a wave vector k and «leaving» from this state which cause dependence of a collision integral and a relaxation time t (k) for charge carriers are spotted. It is shown that the distinction account in dependences of charge carriers