Long-lived electronic-deformation excitations in a polyacetylene chain — the photoexcitation spectrum
Tóm tắt
It is observed that the photoexcitation efficiency of neutral long-lived states in a trans-polyacetylene chain increases with increasing photon energy of the excitation. The observed effect is given an interpretation according to which the energy of a photon above the optical absorption edge is added to the excitation of the vibrational subsystem, increasing sharply the probability that the chain relaxes into a long-lived deformed neutral state.
Tài liệu tham khảo
A. J. Heeger, S. Kivelson, J. R. Schrieffer and W.-P. Su, Rev. Mod. Phys. 60, 781 (1988).
V. M. Kobryanskii and E. A. Tereshko, Synth. Met. 39, 367 (1991).
D. Yu. Paraschuk, S. A. Arnautov, A. N. Shchegolikhin, and V. M. Kobryanskii, JETP Lett. 64, 658 (1996).
D. Yu. Paraschuk, T. A. Kulakov, and V. M. Kobryanskii, Phys. Rev. B 50, 907 (1994).
J. Orenstein, Z. Vardeny, G. L. Baker et al., Phys. Rev. B 30, 786 (1984).
C. V. Shank, R. Yen, R. L. Fork et al., Phys. Rev. Lett. 49, 1660 (1982).
T. Kobayashi, Synth. Met. 50, 565 (1992).
G. S. Kanner, X. Wei, B. C. Hess et al., Phys. Rev. Lett. 69, 538 (1992).
J. Orenstein, in Handbook of Conducting Polymera, edited by T. A. Skotheim, Marcel Dekker, New York, 1986, Vol. 2, p. 1297.
S. Kivelson and C. Wu, Phys. Rev. B 34, 5423 (1986).
E. I. Rashba in Excitons, edited by E. I. Rashba and M. D. Sturge, North Holland, Amsterdam, 1982 [Russian translation, Nauka, Moscow, 1985].
J. S. Baskin, L. Banares, S. Pederson and A. H. Zewail, J. Phys. Chem. 100, 11920 (1996).
R. J. Sension, S. T. Repinec, A. Z. Szarka, and R. M. Hochstrasser, J. Chem. Phys. 98, 6291 (1993).
D. Yu. Paraschuk, T. A. Kulakov, R. I. Rokitskii, and V. M. Kobryanskii, Synth. Met. 84, 949 (1997).
T. A. Kulakov, Candidate’s Dissertation [in Russian], Department of Physics, Moscow State University, Moscow, 1997.
V. M. Kobryanskii, unpublished.