Undamped kinematical excitations in molecular chains

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

Physica A: Statistical Mechanics and its Applications, 1990, vol. 163, issue 2, 483-490

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.

Date: 1990
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:163:y:1990:i:2:p:483-490

DOI: 10.1016/0378-4371(90)90139-J

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