Effects of many-electron jumps in the relaxation and conductivity of Coulomb glasses
نویسندگان
چکیده
A numerical study of the energy relaxation and conductivity of the Coulomb glass is presented. The role of many-electron transitions is studied by two complementary methods: a kinetic Monte Carlo algorithm and a master equation in configuration space. A calculation of the transition rate for two-electron transitions is presented, and the proper extension of this to multielectron transitions is discussed. It is shown that the inclusion of two-electron transitions does not affect appreciably the conductivity in variable-range hopping in the regime accessible by Monte Carlo simulations. Twoand three-electron transitions are important in bypassing energy barriers which effectively block sequential one-electron transitions. Energy relaxation is much faster when they are included.
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