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Optical reflectivity spectra of the mixed-stack organic charge-transfer crystal tetrathiafulvalene-p-chloranil under hydrostatic pressure

Y. Kaneko, S. Tanuma, Y. Tokura, and T. Koda

T. Mitani

G. Saito

  • Department of Applied Physics, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan

  • Institute for Molecular Science, Myodaiji, Okazaki 444, Japan

  • Institute for Solid State Physics, University of Tokyo, Minato-ku, Tokyo 106, Japan

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Phys. Rev. B 35, 8024 – Published 15 May, 1987

DOI: https://doi.org/10.1103/PhysRevB.35.8024

Abstract

Optical reflectivity spectra and electric conductivity have been measured on single crystals of tetrathiafulvalene (TTF)-p-chloranil under hydrostatic pressure up to 11 kbar at room temperature. From their characteristic behavior under pressure, it is concluded that TTF-p-chloranil crystals undergo a gradual pressure-induced neutral-to-ionic (N-I) transition in an intermediate region from 0 to about 10 kbar, in contrast with a first-order temperature-induced N-I transition. In this pressure range, both quasineutral and quasi-ionic molecular domains coexist in the lattice, until a discontinuous transition to a dimerized ionic phase occurs at about 11 kbar. It is suggested that the dynamical behavior of N-I domain walls is responsible for a pressure-induced exponential increase of the electric conductivity.

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References (20)

  1. H. M. McConnell, B. M. Hoffman and R. M. Metzger, Proc. Natl. Acad. Sci. U. S. A. 53, 46 (1965).
  2. J. B. Torrance, J. E. Vazquez, J. J. Mayerle and V. Y. Lee, Phys. Rev. Lett. 46, 253 (1981).
  3. J. B. Torrance, A. Girlando, J. J. Mayerle, J. I. Crowley, V. Y. Lee, P. Batail and S. J. LaPlaca, Phys. Rev. Lett. 47, 1747 (1981).
  4. Y. Tokura, T. Koda, T. Mitani and G. Saito, Solid State Commun. 43, 757 (1982).
  5. Y. Tokura, Y. Kaneko, H. Okamoto, S. Tanuma, T. Mitani and G. Saito, Mol. Cryst. Liq. Cryst. 125, 71 (1985).
  6. Y. Tokura, T. Koda, T. Mitani and G. Saito, J. Phys. Soc. Jpn. 53, 4445 (1984).
  7. Y. Tokura, H. Okamoto, T. Koda, T. Mitani and G. Saito, Solid State Commun. 57, 607 (1986).
  8. A. Girlando, C. Pecile, A. Brillante and K. Syassen, Solid State Commun. 57, 891 (1986).
  9. N. Karl, Crystals-Growth, Properties, and Application (Springer, Berlin, 1980), pp. 59–64.
  10. E. Fishman and H. G. Drickamer, Anal. Chem. 28, 804 (1956).
  11. S. Kagoshima, Y. Kanai, M. Tani, Y. Tokura and T. Koda, Mol. Cryst. Liq. Cryst. 120, 9 (1985).
  12. A. Girlando, F. Marzola, C. Pecile and J. B. Torrance, J. Chem. Phys. 79, 1075 (1983).
  13. R. M. Metzger and J. B. Torrance, J. Am. Chem. Soc. 107, 117 (1985).
  14. J. Hubbard and J. B. Torrance, Phys. Rev. Lett. 47, 1750 (1981).
  15. Y. Tokura, H. Okamoto, T. Koda, T. Mitani and G. Saito, Physica 143B, 527 (1986).
  16. T. Mitani, Y. Tokura, Y. Kaneko, K. Takaoka, T. Koda and G. Saito, Synth. Metals 19, 515 (1987).
  17. N. Nagaosa, Solid State Commun. 57, 179 (1986).
  18. N. Nagaosa, J. Phys. Soc. Jpn. 55, 2757 (1986); ibid. 55, 3497 (1986).
  19. T. Mitani, G. Saito, Y. Tokura and T. Koda, Phys. Rev. Lett. 53, 842 (1984).
  20. T. Mitani, Y. Kaneko, S. Tanuma, Y. Tokura, T. Koda and G. Saito, Phys. Rev. B 35, 427 (1987).

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Phys. Rev. B 35, 8024– Published 15 May, 1987
  • Received 10 November 1986

© 1987 American Physical Society

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