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Infrared Absorption by Granular Metals

Published online by Cambridge University Press:  28 February 2011

D.B. Tanner ,
Y.H. Kim  and
C.L. Carr
D.B. Tanner
Affiliation:
Department of Physics, University of Florida, Gainesville, FL 32611
Y.H. Kim
Affiliation:
Department of Physics, University of Florida, Gainesville, FL 32611
C.L. Carr
Affiliation:
Department of Physics, University of Florida, Gainesville, FL 32611
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Abstract

The infrared properties of granular metals and superconductors are qualitatively in accord with effective medium ideas, with insulating behavior below a percolation transition and metallic response above. An exception is the far-infrared absorption at low metallic concentrations, which is much stronger than theoretical predictions. Measurements of superconductors and of normal metals in different hosts suggest that this absorption is predominately electric dipole rather than the magnetic dipole (eddy current) absorption which is expected to be the dominant low-frequency loss in highly conducting particles. Measurements of clustered and non-clustered samples suggest that the strong far-infrared absorption does not arise from the clustering together of the individual metallic particles, although clustering does lead to about a tenfold increase in absorption.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 195: Symposium S – Physical Phenomena in Granular Materials , 1990 , 3
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

1. Harris, L., McGinnes, T.R., and Siegel, B.M., J. Opt. Soc. Am. 38, 583 (1948).Google Scholar
2.For a review, see Carr, G.L., Perkowitz, S., and Tanner, D.B., in Infrared and Millimeter Waves, Vol. 15, edited by Button, K.J. (Academic Press, Orlando, 1984).Google Scholar
3. A collection of recent papers can be found in ETOPIM2, edited by Lafait, J. and Tanner, D.B. (North-Holland, Amsterdam, 1989). This is also available as Physica A 157.Google Scholar
4. Devaty, R.P., Physica A 157, 262 (1989).Google Scholar
5. Tanner, D.B., Sievers, A.J., and Buhrman, R.A., Phys. Rev. B 11, 1330 (1974).Google Scholar
6. Granqvist, C.G., Buhrman, R.A., and Sievers, A.J., Phys. Rev. Lett. 10, 625 (1976).Google Scholar
7. Russell, N.E., Garland, J.C., and Tanner, D.B., Phys. Rev. B 23, 632 (1981).Google Scholar
8. Carr, G.L., Henry, R.L., Russell, N.E., Garland, J.C., and Tanner, D.B., Phys. Rev. B 24, 777 (1981).Google Scholar
9. Devaty, R.P. and Sievers, A.J., Phys. Rev. Lett. 52, 1344 (1984).Google Scholar
10. Curtin, W.A. and Ashcroft, N.E., Phys. Rev. B 31, 3287 (1985).Google Scholar
11. Lee, Sung-Ik, Noh, Tae Won, Cummings, Kevin, and Gaines, J.R., it Phys. Rev. Lett. 55, 1626 (1985); Tae Won Noh, Sung-Ik Lee, Yi Song, and J.R. Gaines, Phys. Rev. B 34, 2882 (1986).Google Scholar
12. Kim, Y.H. and Tanner, D.B., Phys. Rev. B 39, 3585 (1989).Google Scholar
13. Carr, G.L., Garland, J.C., and Tanner, D.B., Phys. Rev. Lett. 50, 1607 (1983).Google Scholar
14.For some samples, a thick (̃ 2 cm) layer of KCI was compressed on top of the AI/KCI mixture. The interference fringes in this thick sample were not resolved. This fringe removal scheme gave results similar to just averaging out the periodic oscillations in the data.Google Scholar
15. Glover, R.E. and Tinkham, M., Phys. Rev. 108, 243 (1957).Google Scholar
16. Garnett, J.C.M., Philos. Trans. R. Soc. London 203, 385 (1904); 205, 237 (1906).Google Scholar
17. Bruggeman, D.A.G. Ann. Phys. (Leipzig) 24, 636 (1935).Google Scholar
18. Landauer, R., J. Appl. Phys. 23, 779 (1952).Google Scholar
19. Cummings, K.D., Garland, J.C., and Tanner, D.B., Phys. Rev. B 30, 4170 (1984).Google Scholar
20. Mattis, D.C. and Bardeen, J., Phys. Rev. 111, 412 (1958).Google Scholar
21. Simanek, E., Phys. Rev. Lett. 38, 1161 (1977); R. Ruppin, Phys. Rev. B 19,1318 (1979).Google Scholar
22. Sen, P.N. and Tanner, D.B., Phys. Rev. B 26, 3582 (1982).Google Scholar
23. Niklasson, G.A., Yatsuya, S., and Granqvist, C.G., Solid State Commun. 59, 579 (1986); G.A. Niklasson, Physica A 157, 364 (1989).Google Scholar
24. Bergman, D.J., Ann. Phys. (NY) 138, 78 (1982); G.W. Milton, J. Appl. Phys. 52, 5286 (1981).Google Scholar
25. Ericksson, T.S., Hjortberg, A., Niklasson, G.A., and Granqvist, C.G., Appl. Optics 20, 2742 (1981).Google Scholar
26. Garner, J. and Stroud, D., Phys. Rev. B 28, 2447 (1983).Google Scholar