Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2003-02-21
J. Phys.: Condens. Matter 18 (2006) 1999-2012
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
17 pages, 8 figures; Fixed minor typos and updated references
Scientific paper
10.1088/0953-8984/18/6/015
We have used modern supercomputer facilities to carry out extensive Monte Carlo simulations of 2D hopping (at negligible Coulomb interaction) in conductors with the completely random distribution of localized sites in both space and energy, within a broad range of the applied electric field $E$ and temperature $T$, both within and beyond the variable-range hopping region. The calculated properties include not only dc current and statistics of localized site occupation and hop lengths, but also the current fluctuation spectrum. Within the calculation accuracy, the model does not exhibit $1/f$ noise, so that the low-frequency noise at low temperatures may be characterized by the Fano factor $F$. For sufficiently large samples, $F$ scales with conductor length $L$ as $(L_c/L)^{\alpha}$, where $\alpha=0.76\pm 0.08 < 1$, and parameter $L_c$ is interpreted as the average percolation cluster length. At relatively low $E$, the electric field dependence of parameter $L_c$ is compatible with the law $L_c\propto E^{-0.911}$ which follows from directed percolation theory arguments.
Kinkhabwala Yusuf A.
Korotkov Alexander N.
Likharev Konstantin K.
Sverdlov Viktor A.
No associations
LandOfFree
A Numerical Study of Transport and Shot Noise at 2D Hopping does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Numerical Study of Transport and Shot Noise at 2D Hopping, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Numerical Study of Transport and Shot Noise at 2D Hopping will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-482779