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      https://www.ias.ac.in/article/fulltext/boms/014/02/0125-0130

    • Keywords

       

      Hole conductivity; Hall constant; bismuth cuprates; iron-substituted YBaCuO; n-type; bi-polaron; Hirsch model

    • Abstract

       

      Hall constants (RH) at 300 K of three families of CuO-based superconductors are presented—the 123 YBaCuO with Fe substitution, the 2212 and 2223 Bi systems with Pb, Gd, Nd. Sm substitutions. In all these systems.RH is positive indicating hole conductivity.Tc increases initially as the hole density (p=1/RHe) increases and shows a maximum. Each family shows a maximum value ofTc but at different values ofp. These data along with the observation ofn-type conductivity in NdCeCuO are discussed in the light of certain models.

    • Author Affiliations

       

      R Suryanarayanan1 M Rateau1 O Gorochov1 G Priftis1 2 H Pankowska1 L Ouhammou1

      1. Laboratoire de Physique des Solides de Bellevue CNRS, Meudon - 92195, France
      2. Physics Department, University of Patras, Patras - 26110, Greece

    • Dates

       
      Published
      April 1991

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

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      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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