It was appropriate to consider high temperature superconductors at this meeting because it is already clear that the Cu d electrons are strongly correlated and that many of the questions being asked about the copper perovskites are the same as those asked about NiO or CuO. To understand the relevance of the present developments in high temperature superconductivity it is desirable to recall some of the earlier developments. Although superconductivity was discovered in 1911,1,2 the first really important insight into the phenomena came in the 1930’s after the discovery of Meissner and Ochsenfeld that magnetic flux lines were actively expelled from a sample when the material in a magnetic field was cooled through the transition to the superconducting state3. This led to the concept that diamagnetism was a fundamental characteristic of the superconducting state, and to the London equations4,5.
KeywordsHigh Temperature Superconductor Superconducting State Heavy Fermion Short Coherence Length Magnetic Flux Line
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- 1.H. Kamerlingh Ormes, Leiden Comm. 124C, (1911).Google Scholar
- 2.H. Kamerlingh Onnes, Akad. van Wetenschappen (Amsterdam) 14:113, 818 (1911).Google Scholar
- 4a.F. London and H. London, Proc. Roy. Soc. A152-.24 (1935).Google Scholar
- 6.V.L. Ginsburg, JETP (USSR) 14:134 (1946)Google Scholar
- 6.V.L. Ginsburg, Uspekhi Fiz Nauk 48:25 (1952).Google Scholar
- 8.C. Kittel, in: “Introduction to Solid State Physics”, 5th Ed. J. Wiley, New York (1976).Google Scholar
- 9.“Superconductivity in Ternary Compounds”, Ed. O. Fischer and M.B. Maple, Springer, N.Y. (1982); “Proceedings of the Adriatico Conference on High Temperature Superconductors”, Eds. S. Lundqvist, E. Tosatti, M. Tosi and Yu Lu, World Scientific, Singapore, (1987); J. Franse, private communication.Google Scholar
- 12a.B. Batlogg, Physica 126B;275 (1984) and references therein.Google Scholar
- 14.W. Heisenberg, Z. Naturforschung 2a:424 (1947).Google Scholar
- 15.N. Bohr, Physica 19:761 (1953)Google Scholar
- 18.G.M. Eliashberg, Sov. Phys. JETP, 11:696 (1960).Google Scholar
- 21.see e.g. J. Orenstein, G.A. Thomas, D.H. Rapkine, C.G. Bethea, B.F. Levine, B. Batlogg, R.J. Cava, D.W. Johnson Jr. and E.A. Rietman, Phys. Rev. B36:8829 (1987)Google Scholar