Correlation of structure and properties in Ba-doped Bi-2201 phase

Zhiqiang Mao, Mingrong Ji, Mingliang Tian, Jingsheng Zhu, Yuheng Zhang

Research output: Contribution to journalArticlepeer-review


The characteristic feature of electronic structure of the Ba-doped 2201 phase was studied by electron diffraction XPS and UPS spectra. The study on its superconductivity shows that the appropriate substitution of Ba for Sr (x≤0.2) can raise the Tc of 2201 phase; but as x exceeds 0.3, Tc decreases sharply, simultaneously accompanied with the superconductor-insulator transition. Based on all these experimental results, the relation between incommensurate modulation structure, electronic structure and superconductivity for the Bi-2201 phase were discussed comprehensively. It was found that the replacement of Ba2+ for Sr2+ intensifies the mismatch between Bi-O layers and perovskite blocks and the enhancement of this mismatch finally leads to the variation of electronic state of Cu3d hence leads to the transition from superconducting to insulating phase.

Original languageEnglish (US)
Pages (from-to)315-321
Number of pages7
JournalWuli Xuebao/Acta Physica Sinica
Issue number2
StatePublished - Feb 1 1994

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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