Abstract
Activationless hopping conductivity in a strong electric field is caused by downward jumps of localized carriers along the electric field. Here, the specific mechanism of energy release is considered, which involves an energy-transfer process when energy gained by a downward jump of one electron is radiationlessly transferred to another electron, allowing it to make an upward energy jump. An estimate shows that such processes may provide a noticeable contribution to the total hopping conductivity.