Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 115, Issue 18, Pages 5312-5321Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp1093492
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Funding
- Ministry of Education [T207B1214]
- Singapore National Research Foundation [CRP5-2009-04]
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Improved results using a method similar to the Munn-Silbey approach have been obtained on the temperature dependence of transport properties of an extended Holstein model incorporating simultaneous diagonal and off-diagonal exciton phonon coupling. The Hamiltonian is partially diagonalized by a canonical transformation, and optimal transformation coefficients are determined in a self-consistent manner. Calculated transport properties exhibit substantial corrections on those obtained previously by Munn and Silbey for a wide range of temperatures thanks to a numerically exact evaluation and an added momentum-dependence of the transformation matrix Results on the diffusion coefficient in the moderate and weak coupling regime show distinct band-like and hopping-like transport features as a function of temperature.
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