ARPES study on four layered superconductor compound Ba2Ca3Cu4O8(O,F)2 (F0234)

ORAL

Abstract

An interesting phenomenon found in several families of cuprate superconductors is that with the increase of the number of CuO$_{2}$ layers (that are believed to be responsible for the superconducting phenomenon) within a unit cell of the crystal, the T$_{c}$ increase first with the layer number n when n$<$=3, then decrease when n$>$3 and reach the maximum at n=3. To understand this, we use the Angular Resolved Photoemission Spectroscopy (ARPES) to study the four layered cuprate superconductor F0234 and compare the results with results from compounds with less layers. We found that the electronic band structure of the four layered system exhibits clear difference from the previously studied cuprate superconductors with less layers. These results provide new insights on the nature of cuprate physics.

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Authors

  • Yulin Chen

    Physics Department, Stanford University

  • Wanli Yang

    Department of Applied Physics, Stanford University and Advanced Light Source, Lawrence Berkeley National Laboratory

  • Xingjiang Zhou

    Stanford Synchrotron Radiation Laboratory and Advanced Light Source, Lawrence Berkeley National Laboratory

  • Donghui Lu

    Stanford Synchrotron Radiation Laboratory, Stanford University

  • Akira Iyo

  • Hiroshi Eisaki

    National Institute of Advanced Industrial Science and Technology, Japan, AIST, Japan, AIST

  • Zahid Hussain

    Advanced Light Source, Lawrence Berkeley National Laboratory

  • Zhi-Xun Shen

    Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford Univ., Department of Physics, Department of Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305, Departments of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University