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Giant fluctuations of coulomb drag in a bilayer system | | A S Price
; A K Savchenko
; B N Narozhny
; G Allison
; D A Ritchie
; | | Date: |
6 Apr 2007 | | Journal: | Science, 316 (5821), 99-102 | | Abstract: | The Coulomb drag in a system of two parallel layers is the result of electron-electron interaction between the layers. We have observed reproducible fluctuations of the drag, both as a function of magnetic field and electron concentration, which are a manifestation of quantum interference of electrons in the layers. At low temperatures the fluctuations exceed the average drag, giving rise to random changes of the sign of the drag. The fluctuations are found to be much larger than previously expected, and we propose a model that explains their enhancement by considering fluctuations of local electron properties. | | Source: | PubMed, pmid17412956 doi: 10.1126/science.1139227 | | Other source: | [GID 941029] arxiv.0704.1242 | | Services: | Forum | Review | Favorites | |
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