Study of two-electron jumps in relaxation of Coulomb glasses
Article first published online: 20 JAN 2010
Copyright © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Annalen der Physik
Volume 18, Issue 12, pages 877–881, December 2009
How to Cite
Bergli, J., Somoza, A.M. and Ortuño, M. (2009), Study of two-electron jumps in relaxation of Coulomb glasses. Ann. Phys., 18: 877–881. doi: 10.1002/andp.200910376
- Issue published online: 20 JAN 2010
- Article first published online: 20 JAN 2010
- Manuscript Accepted: 14 SEP 2009
- Manuscript Received: 1 SEP 2009
- MICINN. Grant Number: FIS2009-13483
- F. Seneca. Grant Number: 08832/PI/08
- Coulomb glasses;
- hopping transport.
A long-standing debate in the theory of hopping insulators concerns the role of multi-electron transitions in the dynamics of the system. The natural assumption is that as temperature is lowered, two-electron transitions will play an increasingly important role since they provide a way of tunneling through additional energy barriers which would be energetically unfavorable as successive one-electron transitions. This was disputed in , but later it was seen in . The reason for this discrepancy is not clear and deserves further attention. One point where the two approaches diverged was in the selection and weighting of the two-electron transitions relative to one-electron transitions. We present calculations of the transition rates to second order in the tunneling matrix element, which will be used in improved numerical studies. We compare results for only one-electron jumps with results including also two-electron jumps.