Nanoscale effects in field electron emission of ultrathin metal films

The electron field emission of nanoscale structures is considered in the framework of Bardeen transfer Hamiltonian approach. The model involved the finite size of emitter in electron emission direction is proposed. The emission is considered as tunnelling between two many-particle quantum states. The master formulas are obtained and the numerical algorithm is proposed. In the reductive model, the numerical estimations of nanoscale effects in the electron field emission of ultrathin metal films have been done.