OPTICAL ABSORPTION IN THE SOLITON MODEL FOR POLYACETYLENE
نویسندگان
چکیده
منابع مشابه
Optical absorption from polarons in a model of polyacetylene
We present a theoretical calculation, within a continuum electron-phonon-coupled model, of the optical absorption due to polarons in polyacetylene [{CH),]. Our results can be applied to both transand cis-(CH)„, as well as potentially to other polymers (polypyroles, polyparaphenylenes) in which polarons are present. We establish that the essential signature of polaron absorption is the existence...
متن کاملPinned mode in polyacetylene: A distribution of soliton-lattice densities.
The pinned mode in optically excited polyacetylene Is a vibrational envelope with a width of =500 cm centered at 500 cw,". The width of this mode has been attributed to single solitons interacting with a wide range of pinin par etrs. The constancy of the envelope for polyacetylene prepared by disparate methods (Shirakawa and Durham)d Cis-trans ratios, casts doubt on this concept as the underlyi...
متن کاملBreathers and Photoinduced Absorption in Polyacetylene
'The dynamics of trans-polyacetylene is studied within the adiabatic model of Su, Schrieffer, and Beeper. A single soliton has a maximum velocity, v, which can be higher than the sound velocity. A long-time simulation shows that, from an initial electron-hole pair, a soliton and antisoliton emerge with velocities +v and that a persistent breather is left behind. 'This breather may account for t...
متن کاملSoliton Excitations in Polyacetylene and Relativistic Field Theory Models*
A continuum model of a Peierls-dimerized chain, as described generally by Brazovskii and discussed for the case of polyacetylene by Takayama, Lin-Liu and Maki (TLM), is considered. The continuum (Bogliubov-de Gennes) equations arising in this model of interacting electrons and phonons are shown to be equivalent to the static, semiclassical equations for a solvable model field theory of self-cou...
متن کاملthe search for the self in becketts theatre: waiting for godot and endgame
this thesis is based upon the works of samuel beckett. one of the greatest writers of contemporary literature. here, i have tried to focus on one of the main themes in becketts works: the search for the real "me" or the real self, which is not only a problem to be solved for beckett man but also for each of us. i have tried to show becketts techniques in approaching this unattainable goal, base...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Modern Physics Letters B
سال: 1996
ISSN: 0217-9849,1793-6640
DOI: 10.1142/s0217984996000511