2002/08/26 by A. V. Savin, Leonid I. Manevitch, L. I. Manevitch · 36 citations
Chemistry · Computer Science · Physics and Astronomy · #Advanced Fiber Laser Technologies #Breather #Chain (unit) #Chemistry #Condensed matter physics #Excitation #Nonlinear Dynamics and Pattern Formation #Nonlinear Photonic Systems #Nonlinear system #Physics #Polyethylene #Quantum mechanics #Valence (chemistry) #cond-mat.dis-nn
paper · pdf · doi:10.1103/physrevb.67.144302
published in Physical review. B, Condensed matter 67(14) (American Physical Society) · 5 pages, 6 figures
arxiv created 2002/08/26 · openalex publication_date 2003/04/11 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The existence of discrete breathers or intrinsic localized modes (localized periodic oscillations of transzigzag) is shown. In the localization region periodic contraction-extension of valence C---C bonds occurs, which is accompanied by decrease-increase of valence angles. The concentration of thermally activated formation of discrete breathers in the chain has to increase when temperature grows. However, the breather in thermalized chain has a finite time of life decreasing with growth of the temperature. It is a reason for nonmonotonous dependence of concentration breathers upon temperature T. Concentration increases for small temperature (T<200K) and decreases for large temperature (T>200K) with maximal magnitude for T=200K. One can identify the revealed breathers as a unique type of stable localized periodic elementary excitation in thermalized polymer crystal existing even for sufficiently small temperature and contributing essentially to heat capacity.