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Fermi Surface Study of Organic Metals (Bedt-TTF)2X

Published online by Cambridge University Press:  25 February 2011

M. Tokumoto ,
A. G. Swanson ,
J. S. Brooks ,
C. C. Agosta ,
S. T. Hannahs ,
N. Kinoshita ,
H. Anzai ,
M. Tamura ,
H. Tajima  and
H. Kuroda
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M. Tokumoto
Affiliation:
Electrotechnical Laboratory, Tsukuba, Ibaraki 305, Japan
A. G. Swanson
Affiliation:
Department of Physics, Boston University, Boston, MA 02215, U. S. A.
J. S. Brooks
Affiliation:
Department of Physics, Boston University, Boston, MA 02215, U. S. A.
C. C. Agosta
Affiliation:
Francis Bitter National Magnet Laboratory, MIT, Cambridge, MA 02138., U. S. A.
S. T. Hannahs
Affiliation:
Francis Bitter National Magnet Laboratory, MIT, Cambridge, MA 02138., U. S. A.
N. Kinoshita
Affiliation:
Electrotechnical Laboratory, Tsukuba, Ibaraki 305, Japan
H. Anzai
Affiliation:
Electrotechnical Laboratory, Tsukuba, Ibaraki 305, Japan
M. Tamura
Affiliation:
Department of Chemistry, Faculty of Science, The University of Tokyo, Tokyo 113, Japan
H. Tajima
Affiliation:
Department of Chemistry, Faculty of Science, The University of Tokyo, Tokyo 113, Japan
H. Kuroda
Affiliation:
Department of Chemistry, Faculty of Science, The University of Tokyo, Tokyo 113, Japan
A. Ugawa
Affiliation:
Department of Chemistry, Faculty of Science, The University of Tokyo, Tokyo 113, Japan
K. Yakushi
Affiliation:
Institute for Molecular Science, Okazaki 444, Japan
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Abstract

Observations of Shubnikov-de Haas(SdH) and de Haas-van Alphen(dHvA) oscillations in organic metals (BEDT-TTF)2X, with X=KHg(SCN)4, θ-I3 and β″-AuBr2. are reported. In KHg(SCN)4 salt, in addition to the SdH oscillations with fundamental frequency of 670 T corresponding to about 16% of the first Brillouin zone(FBZ), we observed splitting of each SdH peak which we ascribed to “spin-splitting” We have also found that the ground state of this salt is not a simple metal but has some magnetic character. In θ-l3 salt we have succeeded in an observation of dHvA oscillations for the first time. We observed a “saw-tooth” dHvA oscillation characteristic to a highly two-dimensional and extraordinary clean electronic system. In addition to the fundamental frequency of 4170 T corresponding to 50.4 % of the FBZ and its higher harmonics, we observed an oscillation with lower frequency of 730 T corresponding to about 8.8 % of the FBZ. A new Fermi surface topology for θ-l3 salt is proposed based on the analysis of the dHvA effect. In β″-AuBr2, we observed complex dHvA oscillations, which can be explained in terms of the mixing of two fundamental frequencies of 47 and 268 T, suggesting the presence of very small pockets corresponding to 0.6 and 2.9 % of the FBZ.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 247: Symposium N – Electrical, Optical, and Magnetic Properties of Organic Solid State Materials , 1992 , 515
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

1. Oshima, M., Mori, H., Saito, G., and Osnima, K., Chem. Lett. 1989, 1159 (1989).Google Scholar
2. Osada, T., Yagi, R., Kawasumi, A., Kagoshima, S., Miura, N., Oshima, M., and Saito, G., Phys. Rev. B41, 5428 (1990).Google Scholar
3. Tokumoto, M., Swanson, A. G., Brooks, J. S., Agosta, C. C, Hannahs, S. T., Kinoshita, N., Anzai, H. and Anderson, J. R., J. Phys. Soc. Jpn. 59 2324 (1990).Google Scholar
4. Sasaki, T., Toyota, N., Tokumoto, M., Kinoshita, N. and Anzai, H., Solid State Commun. 75, 97 (1990).Google Scholar
5. Kobayashi, H., Kato, R., Kobayashi, A., Nishino, Y., Kajita, K. and Sasaki, W., Chem. Lett. 1986, 789 (1986).Google Scholar
6. Kobayashi, H., Kato, R., Kobayashi, A., Nishino, Y., Kajita, K. and Sasaki, W., Chem. Lett. 1986, 833 (1986).Google Scholar
7. Kato, R., Kobayashi, H., Kobayashi, A., Nishino, Y., Kajita, K. and Sasaki, W., Chem. Lett. 1986, 957 (1986).Google Scholar
8. Kobayashi, A., Kato, R., Kobayashi, H., Moriyama, S., Nishino, Y., Kajita, K. and Sasaki, W., Chem. Lett., 1986, 2017 (1986).Google Scholar
9. Kobayashi, H., Kato, R., Kobayashi, A., Mori, T., Inokuchi, H., Nishio, Y., Kajita, K. and Sasaki, W., Synthetic Metals 27A 289 (1988).Google Scholar
10. Tamura, M., Yakushi, K., Kuroda, H., Kobayashi, A., Kato, R. and Kobayashi, H., J. Phys. Soc. Jpn. 57 3239 (1988).Google Scholar
11. Tokumoto, M., Swanson, A. G., Brooks, J. S., Tamura, M., Tajima, H. and Kuroda, H., Solid State Commun. 75, 439 (1990).Google Scholar
12. Pratt, F. L., Fisher, A. J., Hayes, W., Singleton, J., Spermon, S. J. R. M., Kurmoo, M. and Day, P., Phys. Rev. Lett., 61, 2721 (1988).Google Scholar
13. Swanson, A. G., Brooks, J. S., Tokumoto, M., Ugawa, A. and Yakushi, K., in Organic Superconductivity edited by Kresin, V. Z. and Little, W. (Plenum Press, 1990), p. 191‥Google Scholar
14. Brooks, J. S., Naughton, M. J., Ma, Y. P., Chaikin, P. M., and Chamberlin, R. V., Rev. Sci. Instrum. 58, 117 (1987).Google Scholar
15. Mori, H., Tanaka, S., Oshima, M., Saito, G., Mori, T., Maruyama, Y. and Inokuchi, H., Bull. Chem. Soc. Jpn., 63, 2183(1990).Google Scholar
16. Shoenberg, D., Maonetic Oscillations in Metals (Cambridge Univ. Press, 1984)Google Scholar
17. Oshima, M., Mori, H., Saito, G., and Oshima, K., The Physics and Chemistry of Organic Superconductors, edited by Saito, G. and Kagoshima, S. (Springer-Verlag, 1990), p. 257.Google Scholar
18. Kinoshita, N. (private communication).Google Scholar
19. Sasaki, T., Toyota, N., Tokumoto, M., Kinoshita, N. and Anzai, H., Solid State Commun. 75 93 (1990).Google Scholar
20. Kinoshita, N., Tokumoto, M. and Anzai, H., J. Phys. Soc. Jpn. 59. 3410(1990).Google Scholar
21. Wang, H. H., Karlson, K. D., Geiser, U., Kwok, W. K., Vashon, M. D., Thompson, J. E., Larsen, N. F., McCabe, G. D., Hulscher, R. S. and Williams, J. M., Physica C, 166, 57 (1990).Google Scholar
22. Kittel, C., Introduction to Solid State Physics (John Wiley & Sons, 1986).Google Scholar
23. Mori, T., Sakai, F., Saito, G. and Inokuchi, H.. Chem. Lett. 1986 1037 (1986).Google Scholar
24. Kajita, K., Nishio, Y., Moriyama, S., Sasaki, W., Koto, R., Kobayashi, H. and Kobayashi, A., Solid State Commun. 60, 811 (1986).Google Scholar