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Undamped kinematical excitations in molecular chains

Author

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  • Kozmidis-Luburić, U.F.
  • Marinković, M.M.
  • Ćirić, D.M.
  • Tošić, B.S.

Abstract

The possibility of the existence of undamped kinematical excitations in one-dimensional molecular crystals is examined. It is shown that such excitations exist although not for all wave vector values in the first Brillouin zone but only in the interval -2π5⩽ka⩽2π5. It is found that for the positive exciton effective mass, undamped kinematical levels are more populated than normal exciton levels since they have substantially lower energies.

Suggested Citation

  • Kozmidis-Luburić, U.F. & Marinković, M.M. & Ćirić, D.M. & Tošić, B.S., 1990. "Undamped kinematical excitations in molecular chains," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 163(2), pages 483-490.
    • Handle: RePEc:eee:phsmap:v:163:y:1990:i:2:p:483-490
    DOI: 10.1016/0378-4371(90)90139-J
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