Effect of Iodine Doping on Bi$_{2}$Sr$_{2}$Ca$_{1}$Cu$_{2}$O$_{x}$: Charge Transfer or Interlayer Coupling?

Details Effect of Iodine Doping on Bi$_{2}$Sr$_{2}$Ca$_{1}$Cu$_{2}$O$_{x}$: Charge Transfer or Interlayer Coupling? Effect of Iodine Doping on Bi$_{2}$Sr$_{2}$Ca$_{1}$Cu$_{2}$O$_{x}$: Charge Transfer or Interlayer Coupling?

1993-12-01

arxiv.org/abs/cond-mat/9312006v1

Physics

Condensed Matter

LBL 9 pages, APS_Revtex. 5 Figures, available upon request. UW-Madison preprint

Scientific paper

10.1016/0921-4534(94)90095-7

A comparative study has been made of iodine-intercalated Bi$_{2}$Sr$_{2}$Ca$_{1}$Cu$_{2}$O$_{x}$ single crystal and 1 atm O$_{2}$ annealed Bi$_{2}$Sr$_{2}$Ca$_{1}$Cu$_{1}$O$_{x}$ single crystal using AC susceptibility measurement, X-ray photoemission (XPS) and angle-resolved ultraviolet photoemission spectroscopy (ARUPS). AC susceptibility measurement indicates that O$_{2}$-doped samples studied have T$_{c}$ of 84 $^{o}$K, whereas T$_{c}$ of Iodine-doped samples studied are 80 $^{o}$K. XPS Cu 2p core level data establish that the hole concentration in the CuO$_{2}$ planes are essentially the same for these two kinds of samples. ARUPS measurements show that electronic structure of the normal states near the Fermi level has been strongly affected by iodine intercalation. We conclude that the dominant effect of iodine doping is to alter the interlayer coupling.

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