Physics – Condensed Matter – Materials Science
Scientific paper
2008-08-20
Physics
Condensed Matter
Materials Science
Scientific paper
10.1063/1.3046292
When an excess charge carrier is added to a one-dimensional (1D) semiconductor immersed in a polar solvent, the carrier can undergo self-localization into a large-radius adiabatic polaron. We explore the local optical absorption from the ground state of 1D polarons using a simplified theoretical model for small-diameter tubular structures. It is found that about 90% of the absorption strength is contained in the transition to the second lowest-energy localized electronic level formed in the polarization potential well, with the equilibrium transition energy larger than the binding energy of the polaron. Thermal fluctuations, however, cause a very substantial -- an order of magnitude larger than the thermal energy -- broadening of the transition. The resulting broad absorption feature may serve as a signature for the optical detection of solvated charge carriers.
Gartstein Yu. N.
Ussery G. L.
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