| Autor: |
J. M. Ginder, Alan G. MacDiarmid, K.R. Cromack, J. M. Leng, Sanjeev K. Manohar, A. J. Epstein, Y. Sun, R. P. McCall, H. J. Ye |
| Rok vydání: |
1992 |
| Předmět: |
|
| Zdroj: |
Physical review letters. 68(8) |
| ISSN: |
1079-7114 |
| Popis: |
We report the first near-steady-state and long time photoinduced- absorption spectroscopies of pernigraniline base, a novel Peierls ground state polymer with multiple order parameters. Two kinds of defects have been observed and distinguished by differing time domains and ir active vibrations. The short- lived defect has a lifetime of msec scale and a defect mass of -5 m; in contrast, the lifetime of the long lived defect (mass -300 m) is greater than several hours at low temperatures. We propose that the short-lived excitation is a soliton defect in the bond length (order parameter or alternation), while the long-lived excitation is a polaron defect in the ring torsion angle order parameter. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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