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Effect of pressure and of doping on superconductivity in the double-mercury-layer cuprate Hg2 (N = 2). A quantitative analysis based on indirect-exchange pairing

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  • Jansen, L.
  • Block, R.

Abstract

Results of recent experiments by Acha et al. [Solid State Commun. 102 (1997) 1] on the effect of pressure on critical temperatures of five samples of the double-mercury-layer compound Hg2Ba2Y1−xCaxCu2O8−δ (in the present paper abbreviated as Hg2 (N = 2)) are analyzed in the framework of indirect-exchange Cooper-pair formation via diamagnetic oxygen anions, developed in earlier publications. It is shown that all experimental results can be quantitatively interpreted on the basis of the indirect-exchange formalism. In particular, observed large increases in TC (⩾55 K) over the pressure range P = 0–20 GPa are quantitatively reproduced. Similarities and differences with the single-mercury-layer cuprates are discussed.

Suggested Citation

  • Jansen, L. & Block, R., 1997. "Effect of pressure and of doping on superconductivity in the double-mercury-layer cuprate Hg2 (N = 2). A quantitative analysis based on indirect-exchange pairing," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 247(1), pages 265-280.
    • Handle: RePEc:eee:phsmap:v:247:y:1997:i:1:p:265-280
    DOI: 10.1016/S0378-4371(97)00444-5
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    References listed on IDEAS

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    1. Jansen, Laurens & Block, Ruud & Stepankin, Vladimir, 1995. "Analysis of superconductivity in Ba1−xKxBiO3 on the basis of indirect-exchange mediated pairing," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 219(3), pages 327-350.
    2. A. Franchini & G. Santoro & V. Bortolani & A. Bellman & D. Cvetko & L. Floreano & A. Morgante & M. Peloi & F. Tommasini & T. Zambelli, 1994. "Role Of The He Atom Surface Potential On The Cu(001) Phonon Determination," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 1(01), pages 67-74.
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