title: Universal size-dependent conductance fluctuations in disordered organic semiconductors.
abstract: Numerically exact results of hopping charge transport in disordered organic semiconductors show for uncorrelated and dipole-correlated Gaussian energy disorder a universal, power-law, and non-power-law dependence, respectively, of the relative conductance fluctuations on the size of the considered region. Data collapse occurs upon scaling with a characteristic length having a power-law temperature dependence. Below this length, which can be as high as 100 nm for correlated disorder in a realistic case, fluctuations dominate and a continuum description of charge transport breaks down.
authors.affiliation: Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, Netherlands.
authors.forename: A
authors.initials: A
authors.lastname: Massé
authors.affiliation: Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, Netherlands and Philips Research Laboratories, High Tech Campus 4, 5656 AE Eindhoven, Netherlands.
authors.forename: R
authors.initials: R
authors.lastname: Coehoorn
authors.affiliation: Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, Netherlands.
authors.forename: P A
authors.initials: PA
authors.lastname: Bobbert