Charge Transfer-TcRelation in the Superconducting Intercalates IBi2Sr2CaCu2Oy

S. J. Hwang, N. G. Park, D. H. Kim, J. H. Choy

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Two different kinds of stage-1 iodine intercalates of Bi2Sr2CaCu2Oywith dissimilarTchave been prepared in order to understand the relationship between superconducting properties and electronic structures. According to the XRD analysis and the magnetic susceptibility measurements, it is found that, in spite of the same basal increments for both intercalates (Δd=~3.6 Å), the iodine intercalate prepared in a vacuum-sealed tube exhibits a largerTcdepression (13 K) compared to the iodine intercalate synthesized in air (ΔTc=6 K). The origin of such differentTcshifts has been investigated by performing the systematic XANES/EXAFS analyses at the I L1-, Cu K-, and Bi L3-edges, where the charge transfer between host and guest is found to be strongly dependent on the reaction condition. From the BVS calculation based on the Cu K-edge EXAFS results, it is clarified that there is an excellent correlation between the amount of hole doping andTcdepression for both iodine intercalates. In this respect, we conclude that, regardless of lattice expansion along thec-axis, theTcof Bi-based cuprate is wholly dependent on the hole concentration of the CuO2layer.

Original languageEnglish
Pages (from-to)66-73
Number of pages8
JournalJournal of Solid State Chemistry
Volume138
Issue number1
DOIs
Publication statusPublished - 1998 Jun 1

Fingerprint

Iodine
iodine
Charge transfer
charge transfer
vacuum tubes
Hole concentration
Magnetic susceptibility
cuprates
Electronic structure
Doping (additives)
Vacuum
electronic structure
magnetic permeability
expansion
air
Air

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Hwang, S. J. ; Park, N. G. ; Kim, D. H. ; Choy, J. H. / Charge Transfer-TcRelation in the Superconducting Intercalates IBi2Sr2CaCu2Oy. In: Journal of Solid State Chemistry. 1998 ; Vol. 138, No. 1. pp. 66-73.
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Charge Transfer-TcRelation in the Superconducting Intercalates IBi2Sr2CaCu2Oy. / Hwang, S. J.; Park, N. G.; Kim, D. H.; Choy, J. H.

In: Journal of Solid State Chemistry, Vol. 138, No. 1, 01.06.1998, p. 66-73.

Research output: Contribution to journalArticle

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