Hopping conductivity beyond the percolation regime probed by shot-noise measurements
نویسندگان
چکیده
منابع مشابه
Shot noise at hopping via two sites
Shot noise in mesoscopic structures has been the subject of thorough studies in the recent past. In particular, a theory of shot noise at tunneling of single electrons correlated due to Coulomb blockade effects has been well developed and verified experimentally. Recently, attempts have been made to extend this theory to hopping transport, which can be formally considered as a special case of c...
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We have carried out a preliminary analysis of shot noise at hopping, focusing on uniform one-dimensional ~1D! arrays of sites separated by N tunnel barriers. The results show that at low temperatures the low-frequency density of the shot noise varies from 1/N to 1 of the Schottky value, depending on the geometry, electron density, and Coulomb interaction strength. An interesting feature is v de...
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We have used Monte Carlo simulation to calculate the shot-noise intensity SI(v) at ~two-dimensional! hopping using two models: a slanted lattice of localized sites with equal energies and a set of localized sites with random positions and energies. For wide samples we have found a similar dependence of the Fano factor F[SI(0)/2eI on the sample length L: F}L 2a where a50.8560.02 and a50.8560.07 ...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2003
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.68.073313