RELAXATION DYNAMICS IN CONDUCTION ELECTRONS OF A METAL-SURFACE SYSTEM

Time-evolution of the distribution function of conduction electron is obtained numerically by solving the Boltzmann-Bloch equation with the collision term due to the electron-electron interaction in a one-dimen sional model. The model is set to have a virtual bound state of a chem isorbed atom described by the Newns-Anderson model so that the time-ev olution of electron occupation is obtained in the chemisorbed state. A n interesting enhancement of the electron occupation is found due to a n 'over shoot' of the distribution function in the time-evolution, whe n the energy level of the chemisorbed state is appropriate.