One-dimensional semiconductor in a polar solvent: Solvation and low-frequency dynamics of an excess charge carrier |
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Authors: | YuN Gartstein GL Ussery |
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Institution: | Department of Physics, The University of Texas at Dallas, PO Box 830688, FO23 Richardson, TX 75083, USA |
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Abstract: | Due to solvation, excess charge carriers on 1d semiconductor nanostructures immersed in polar solvents undergo self-localization into polaronic states. Using a simplified theoretical model for small-diameter structures, we study low-frequency dynamical properties of resulting 1d adiabatic polarons. The combined microscopic dynamics of the electronic charge density and the solvent leads to macroscopic Langevin dynamics of a polaron and to the appearance of local dielectric relaxation modes. Polaron mobility is evaluated as a function of system parameters. Numerical estimates indicate that the solvated carriers can have mobilities orders of magnitude lower than the intrinsic values. |
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Keywords: | 71 38 -k 73 63 -b 31 70 Dk |
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