Evidence for strong Coulomb interactions in alkali-TCNQ (tetracyanoquinodimethan) salts

S. K. Khanna; A. A. Bright; A. F. Garito; A. J. Heeger

doi:10.1103/PhysRevB.10.2139

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Evidence for strong Coulomb interactions in alkali-TCNQ (tetracyanoquinodimethan) salts

S. K. Khanna^*, A. A. Bright, A. F. Garito, and A. J. Heeger

Department of Physics and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19174

^*Work submitted in partial fulfillment of the requirements for the Ph.D.

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Phys. Rev. B 10, 2139 – Published 15 September, 1974

DOI: https://doi.org/10.1103/PhysRevB.10.2139

Abstract

Measurements are reported of the dielectric function at optical and microwave frequencies in pure single crystals of potassium tetracyanoquinodimethan [ $K^{+}$ ${(TCNQ)}^{-}$ ], as well as measurements of the microwave conductivity and electron spin resonance. The results indicate that $K^{+}$ ${(TCNQ))}^{-}$ is in the intermediate- to strong-coupling regime with electron-electron Coulomb repulsion and electron-energy bandwidth of the same magnitude. The spin-resonance studies show a single narrow line with no evidence of extra dipolar-split sidebands.

References (21)

A. J. Epstein, S. Etemad, A. F. Garito, and A. J. Heeger, Phys. Rev. B 5, 952 (1972)
P. Pincus, Solid State Commun. 9, 1971 (1971)
J. G. Vegter, J. Kommandeur, and P. A. Fedders, Phys. Rev. B 7, 2929 (1973) J. G. Vegter and J. Kommandeur (to be published) J. G. Vegter, thesis (University of Groningen, 1972) J. G. Vegter and J. Kommandeur, AIP Conf. Proc. 10, 1525 (1973)
S. Etemad, A. F. Garito, and A. J. Heeger, Phys. Lett. A 40, 45 (1972)
J. Murgich and S. Pissanetzky, Chem. Phys. Lett. 18, 420 (1973)
R. G. Kepler, J. Chem. Phys. 39, 3528 (1963)
S. K. Khanna, E. Ehrenfreund, E. F. Rybaczewski, and S. Etemad, AIP Conf. Proc. 10, 1509 (1973)
F. Wooten, Optical Properties of Solids (Academic, New York, 1972), Chap. 3
S. K. Khanna, E. Ehrenfreund, A. F. Garito, and A. J. Heeger, Phys. Rev. B (to be published)
T. Hibma, thesis (University of Groningen, 1973)
L. B. Coleman, J. A. Cohen, A. F. Garito, and A. J. Heeger, Phys. Rev. B 7, 2122 (1973)
L. J. Buravov and I. F. Shchegolev, Prib. Tekh. Eksp. 2, 171 (1971) [Instruments and Experimental Techniques (USSR) 14, 528 (1971)] L. J. Buravov, M. L. Khidekel', I. F. Shchegolev, and E. B. Yagubskii, Zh. Eksp. Teor. Fiz. Pis'ma Red. 12, 142 (1970) [JETP Lett. 12, 99 (1970)]
A. A. Bright, A. F. Garito, and A. J. Heeger, Solid State Commun. 13, 943 (1973) 13, Phys. Rev. B (to be published) A. A. Bright, Ph.D. thesis (University of Pennsylvania, 1973)
S. Hiroma, H. Kuroda, and H. Akamatu, Bull. Chem. Soc. Jap. 44, 9 (1971)
R. M. Vlasova, A. I. Gutman, V. V. Kuzina, and A. I. Sherle, Fiz. Tverd. Tela 12, 3654 (1970) [Sov. Phys.—Solid State 12, 2979 (1971)]
A. A. Bright, P. M. Chaikin, and A. R. McGhie, Phys. Rev. B (to be published)
P. M. Grant, R. L. Greene, G. C. Wrighton, and G. Castro, Phys. Rev. Lett. 31, 1311 (1973)
E. F. Rybaczewski, A. F. Garito, and A. J. Heeger, Bull. Am. Phys. Soc. 18, 450 (1973)
J. C. Scott, A. F. Garito, and A. J. Heeger (to be published)
J. H. Perlstein, J. Ferraris, V. V. Walatka, D. O. Cowan, and G. A. Candela, AIP Conf. Proc. 10, 1494 (1973)
L. B. Coleman, M. J. Cohen, D. J. Sandman, F. G. Yamagishi, A. F. Garito, and A. J. Heeger, Solid State Commun. 12, 1125 (1973)

[c1] A. J. Epstein, S. Etemad, A. F. Garito, and A. J. Heeger, Phys. Rev. B 5, 952 (1972)

[c2] P. Pincus, Solid State Commun. 9, 1971 (1971)

[c3] J. G. Vegter, J. Kommandeur, and P. A. Fedders, Phys. Rev. B 7, 2929 (1973) J. G. Vegter and J. Kommandeur (to be published) J. G. Vegter, thesis (University of Groningen, 1972) J. G. Vegter and J. Kommandeur, AIP Conf. Proc. 10, 1525 (1973)

[c4] S. Etemad, A. F. Garito, and A. J. Heeger, Phys. Lett. A 40, 45 (1972)

[c5] J. Murgich and S. Pissanetzky, Chem. Phys. Lett. 18, 420 (1973)

[c6] R. G. Kepler, J. Chem. Phys. 39, 3528 (1963)

[c7] S. K. Khanna, E. Ehrenfreund, E. F. Rybaczewski, and S. Etemad, AIP Conf. Proc. 10, 1509 (1973)

[c8] F. Wooten, Optical Properties of Solids (Academic, New York, 1972), Chap. 3

[c9] S. K. Khanna, E. Ehrenfreund, A. F. Garito, and A. J. Heeger, Phys. Rev. B (to be published)

[c10] T. Hibma, thesis (University of Groningen, 1973)

[c11] L. B. Coleman, J. A. Cohen, A. F. Garito, and A. J. Heeger, Phys. Rev. B 7, 2122 (1973)

[c12] L. J. Buravov and I. F. Shchegolev, Prib. Tekh. Eksp. 2, 171 (1971) [Instruments and Experimental Techniques (USSR) 14, 528 (1971)] L. J. Buravov, M. L. Khidekel', I. F. Shchegolev, and E. B. Yagubskii, Zh. Eksp. Teor. Fiz. Pis'ma Red. 12, 142 (1970) [JETP Lett. 12, 99 (1970)]

[c13] A. A. Bright, A. F. Garito, and A. J. Heeger, Solid State Commun. 13, 943 (1973) 13, Phys. Rev. B (to be published) A. A. Bright, Ph.D. thesis (University of Pennsylvania, 1973)

[c14] S. Hiroma, H. Kuroda, and H. Akamatu, Bull. Chem. Soc. Jap. 44, 9 (1971)

[c15] R. M. Vlasova, A. I. Gutman, V. V. Kuzina, and A. I. Sherle, Fiz. Tverd. Tela 12, 3654 (1970) [Sov. Phys.—Solid State 12, 2979 (1971)]

[c16] A. A. Bright, P. M. Chaikin, and A. R. McGhie, Phys. Rev. B (to be published)

[c17] P. M. Grant, R. L. Greene, G. C. Wrighton, and G. Castro, Phys. Rev. Lett. 31, 1311 (1973)

[c18] E. F. Rybaczewski, A. F. Garito, and A. J. Heeger, Bull. Am. Phys. Soc. 18, 450 (1973)

[c19] J. C. Scott, A. F. Garito, and A. J. Heeger (to be published)

[c20] J. H. Perlstein, J. Ferraris, V. V. Walatka, D. O. Cowan, and G. A. Candela, AIP Conf. Proc. 10, 1494 (1973)

[c21] L. B. Coleman, M. J. Cohen, D. J. Sandman, F. G. Yamagishi, A. F. Garito, and A. J. Heeger, Solid State Commun. 12, 1125 (1973)

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Evidence for strong Coulomb interactions in alkali-TCNQ (tetracyanoquinodimethan) salts

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