Effect of oxygen concentration on superconducting properties of rubidium tungsten bronzes Rb x WO y

L. C. Ting, H. H. Hsieh, H. H. Kang, D. C. Ling, H. L. Liu, W. F. Pong, F. Z. Chien, P. H. Hor

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Superconducting transition temperature (T c) as a function of oxygen concentration for hexagonal rubidium tungsten bronzes Rb x WO y with 2.80 ≤ y ≤ 3.07 and x = 0.19, 0.23, and 0.27 has been systematically investigated. Three regions corresponding to T c < 2 K (denoted as superconductivity suppressed region), T c∼ 3 K (superconductivity uniform region) and T c > 3 K (superconductivity enhanced region) were identified in T c-y phase diagram for Rb 0.19WO y and Rb 0.23WO y. No superconductivity enhanced region was observed for Rb 0.27WO y. The superconductivity suppressed region shifts toward higher oxygen content as rubidium concentration increases. The local ordering of the intercalated rubidium atoms might be responsible for the intriguing T c-y phase diagram of Rb x WO y.

Original languageEnglish
Pages (from-to)249-253
Number of pages5
JournalJournal of Superconductivity and Novel Magnetism
Volume20
Issue number3
DOIs
Publication statusPublished - 2007 Apr 1

Keywords

  • Oxygen concentration
  • Rubidium tungsten bronzes
  • Superconductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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