Communication: Fast transport and relaxation of vibrational energy in polymer chains
Abstract
We investigate ballistic vibrational energy transport through optical phonon band in oligomeric chains in the presence of decoherence. An exact solution is obtained for the excitation density in the space-time representation in the continuous limit and this solution is used to characterize the energy transport time and intensity. Three transport mechanisms are identified such as ballistic, diffusive, and directed diffusive regimes, occurring at different distances and time scales. The crossover between the two diffusive regimes is continuous, while the switch between the ballistic and diffusive mechanisms occurs in a discontinuous manner in accord with the recent experimental results on energy transport in perfluoroalkanes.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 05, 2015
- Source ID
- 10.1063/1.4905076
Entities
People
- Alexander L. Burin
- Arkady A Kurnosov
- Igor V Rubtsov
Organizations
- Army Research Office
- Louisiana Board of Regents
- National Science Foundation
- Tulane University of Louisiana