Abstract

Energy transfer processes between jumping current carriers in non-ohmic activationless F − 1 4 -hopping conductivity in a strong electric field are considered. An energy gained during the downward spontaneous hopping of one electron can be radiationlessly transferred to another electron enabling it to make an upward energy hopping transition. It is shown that the contribution from these two-electron four-site energy transfer processes into the total hopping conductivity may be comparable or even exceed the contribution from one-electron radiative tunnel transitions. Numerical estimates are based on an example of beta-rhombohedral crystalline boron which exhibits F − 1 4 -field law.

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