Ion-size effects in cuprate superconductors - implications for pairing (Articolo in rivista)

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  • Ion-size effects in cuprate superconductors - implications for pairing (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Alternative label
  • B. P.P. Mallett 1, T. Wolf 2, E. Gilioli 3, F. Licci 3, G. V. M. Williams 1, A. B. Kaiser 1, N. W. Ashcroft 4, N. Suresh 5, J. L. Tallon 5 (2012)
    Ion-size effects in cuprate superconductors - implications for pairing
    in arXiv; Cornell University medical center, New York (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • B. P.P. Mallett 1, T. Wolf 2, E. Gilioli 3, F. Licci 3, G. V. M. Williams 1, A. B. Kaiser 1, N. W. Ashcroft 4, N. Suresh 5, J. L. Tallon 5 (literal)
Pagina inizio
  • 1211.1206 (literal)
Rivista
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  • 5 (literal)
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  • 1 MacDiarmid Institute, SPCS, Victoria University P.O. Box 600, Wellington 6140, New Zealand; 2 Karlsruhe Institute of Technology, Postfach 3640, Karlsruhe 76021, Germany; 3 IMEM-CNR, Institute of Materials for Electronics and Magnetism, 43124 Parma, Italy; 4 Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, N.Y.14853-2501, U.S.A.; 5 MacDiarmid Institute, Industrial Research Limited, P.O. Box 31310, Lower Hutt, New Zealand. (literal)
Titolo
  • Ion-size effects in cuprate superconductors - implications for pairing (literal)
Abstract
  • The standard separation in metals between valence and core states leads in cuprate superconductors to constituent ions which may sustain both charge and spin fluctuations. We change ion size in RA$_2$Cu$_3$O$_y$ (A=(Ba,Sr) and R=(La, ... Lu,Y)) in order to systematically alter both dielectric and magnetic properties. Dielectric fluctuation is characterized by ionic polarizability while magnetic fluctuation is characterized by exchange interactions measurable by Raman scattering. The range of transition temperatures is 70 to 107 K and we find that these correlate only with the dielectric properties, a behavior which persists with external pressure. This highlights the fundamental importance of charge fluctuation and dielectric screening in the cuprates and may signal a novel pairing mechanism having its origin with quantized waves of electronic polarization. (literal)
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