A Survey of Nonadiabatic Superconductivity in Cuprates and Fullerides

Cappelluti, Emmanuele; Grimaldi, Claudio; Pietronero, Luciano; Strässler, Sigfrid
October 2000
International Journal of Modern Physics B: Condensed Matter Phys;10/30/2000, Vol. 14 Issue 25/27, p2938
Academic Journal
High-T[sub c] superconductors are characterized by very low carrier densities. This feature leads to two fundamental consequences: on one hand the Fermi energies are correspondingly small and they can be of the same order of phonon frequencies. In such a situation nonadiabatic corrections arising from the breakdown of Migdal's theorem can not be longer neglected. In addition, small carrier densities imply poor screening and correlation effects have to be taken into account. We present a comprehensive overview of the theory of superconductivity generalized into the nonadiabatic regime which is qualitatively different from the conventional one. In this framework some of the observed properties of the cuprates and the fullerene compounds can be naturally accounted for, and a number of theoretical predictions are proposed that can be experimentally tested.


Related Articles

  • Phonons in A3C60 Lattice and Structural Dynamics. Larsson, Sven // Advances in Condensed Matter Physics;2010, p1 

    The critical temperature (Tc) of superconductivity in A3C60 compounds is generally lower smaller with alkali atoms (A). Furthermore Tc decreases with applied pressure. In the BCS model, these trends are explained by the lower density of states at the Fermi level for a decreased lattice constant...

  • Polar Jahn–Teller centers and the anomalous isotope effect in copper–oxygen high-T[sub c] superconductors. Moskvin, A. S.; Panov, Yu. D. // Journal of Experimental & Theoretical Physics;Feb97, Vol. 84 Issue 2, p354 

    We examine the isotope effect in copper-oxygen high-T[sub c] superconductors using the model of polar Jahn-Teller centers, a variant of the local-boson model. The isotope-effect exponents for oxygen and copper depend on the structure of Jahn-Teller centers and its variation due to boson motion....

  • Counting the ten-year returns. Grant, Paul // Nature;6/13/1996, Vol. 381 Issue 6583, p559 

    Reports on the state of research in high temperature superconductivity electronics in the United States. Theoretical and experimental aspects of high temperature superconductivity; Applications of high temperature superconductivity in electronics; Development of a lead-stabilized cable for use...

  • French report superconductivity. Teresko, John; Stevens, Tim // Industry Week/IW;2/21/94, Vol. 243 Issue 4, p41 

    Reports on the achievement of superconductivity at the temperature of 250 Kelvin by researchers at the National Center for Scientific Research at Grenoble and at the College of Industrial Physics and Chemistry in Paris, France. Materials used by the researchers.

  • Symmetry of the order parameter in the high-T(...) superconductor YBa(...)Cu(...)O(...). Kirtley, J. R.; Tsuei, C. C. // Nature;1/19/1995, Vol. 373 Issue 6511, p225 

    Focuses on the measurement of symmetry of superconducting order parameter. Tests for d-wave symmetry in YBa(...)Cu(...)O(...); Samples with varying parameters; Calibration of intensity of scanning superconducting quantum interference device.

  • Crossovers in cuprates. Batlogg, B.; Emery, V.J. // Nature;7/4/1996, Vol. 382 Issue 6586, p20 

    Examines crossovers in cuprate high-temperature superconductors (HTS). Onset of superconducting correlations based on angle-resolved photoemission experiments; Connection between antiferromagnetism and superconductivity.

  • Spectroscopic evidence for a pseudogap in the normal state of underdoped high-Tc superconductors. Ding, H.; Yokoya, T. // Nature;7/4/1996, Vol. 382 Issue 6586, p51 

    Examines the spectroscopic evidence for a pseudogap in the normal state of underdoped high-temperature superconductors. Energy gap in the electronic excitation spectrum below the superconducting transition temperature; Suppression of spectral weight formed in the normal state above the...

  • Nickel probes superconductivity. Flatte, Michael E. // Nature;6/21/2001, Vol. 411 Issue 6840, p901 

    Suggests that the influence of a magnetic nickel atom on its local environment in a high-temperature superconductor is surprisingly weak, despite its strong effect on global properties. Essence of superconductivity; Factor that reduces the transition temperature at which material becomes...

  • Thermal superconducting–normal transition of superconducting films, induced by the heating of nonsuperconducting defects in microwave fields. Zharov, A. A.; Reznik, A. N. // Technical Physics;Jan98, Vol. 43 Issue 1, p117 

    A study is made of the thermal superconducting-normal (S-N) transition induced in high-temperature superconducting films by the Joule heating of small nonsuperconducting defects in a microwave field. It is shown that the loss of superconductivity either leads to the formation of a finite region...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics