Universal size-dependent conductance fluctuations in disordered organic semiconductors

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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.
Original languageEnglish
Article number116604
Pages (from-to)116604-1/5
Number of pages5
JournalPhysical Review Letters
Publication statusPublished - 2014


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