Annotation
It was shown that the Coulomb interaction between electrons of “active” (resonance) pairs plays a major role in a wide frequency range. Therefore, the conventional approach to the calculation of the super-linearity of the frequency dependence of ac conductivity, based on the single-particle density of states with a Coulomb gap, is inapplicable to the calculation of high-frequency phononless conductivity. The observed superlinearity of the frequency dependence of the phononless hopping conductivity can manifest itself immediately in the region of the crossover from the linear to quadratic frequency dependence of the conductivity.
Received: 2009 November 16
Approved: 2010 June 2
PACS:
72.20.Ee Mobility edges; hopping transport
© 2016 Publisher M.V.Lomonosov Moscow State University
Authors
M.A. Ormont
Department of Semiconductor Physics, Faculty of Physics, Moscow State University, Moscow, 119991, Russia
Department of Semiconductor Physics, Faculty of Physics, Moscow State University, Moscow, 119991, Russia