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Photoinduced valence instability in the organic molecular compound tetrathiafulvalene-p-chloranil (TTF-CA)

S. Koshihara, Y. Tokura, T. Mitani, G. Saito, and T. Koda
Phys. Rev. B 42, 6853(R) – Published 1 October 1990
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Abstract

It was found that a local charge-transfer excitation on the donor(D)-acceptor(A) pair leads to a semimacroscopic valence change from the quasi-ionic (D+A) to quasineutral (D0A0) states in organic molecular-compound TTF-chloranil with mixed DA stacks. Photogenerated neutral-ionic domain walls, which are responsible for anomalous photoconductivity, show the temporal annihilation due to the one-dimensional recombination.

  • Received 24 July 1990

DOI:https://doi.org/10.1103/PhysRevB.42.6853

©1990 American Physical Society

Authors & Affiliations

S. Koshihara and Y. Tokura

  • Department of Physics, University of Tokyo, Tokyo 113, Japan

T. Mitani

  • Institute for Molecular Science, Okazaki 444, Japan

G. Saito

  • Department of Chemistry, Kyoto University, Kyoto, Japan

T. Koda

  • Department of Applied Physics, University of Tokyo, Tokyo 113, Japan

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Vol. 42, Iss. 10 — 1 October 1990

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