Quantum Lattice Fluctuations and Luminescence in C_60
Barry Friedman, (Department of Physics, Texas Center for, Superconductivity, University of Houston, Texas, Department of Physics,, Sam Houston State University, Huntsville, Texas), Kikuo Harigaya,, (Fundamental Physics Section, Physical Science Division, Electrotechnical
TL;DR
This study models luminescence in photo-excited C_60 molecules using a collective coordinate approach within the SSH framework, successfully explaining observed spectral features and predicting new peaks.
Contribution
It introduces a collective coordinate method to analyze luminescence in C_60, linking lattice fluctuations to optical properties, and predicts additional spectral peaks.
Findings
Good agreement with observed luminescence peak spacing
Fair agreement for relative intensity of peaks
Prediction of new unresolved luminescence peaks
Abstract
We consider luminescence in photo-excited neutral C_60 using the Su-Schrieffer-Heeger model applied to a single C_60 molecule. To calculate the luminescence we use a collective coordinate method where our collective coordinate resembles the displacement of the carbon atoms of the Hg(8) phonon mode and extrapolates between the ground state "dimerisation" and the exciton polaron. There is good agreement for the existing luminescence peak spacing and fair agreement for the relative intensity. We predict the existence of further peaks not yet resolved in experiment. PACS Numbers : 78.65.Hc, 74.70.Kn, 36.90+f
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