Stacking Variants and Superconductivity in the Bi鈥揙鈥揝 System

详细信息    查看全文

• 作者：W. Adam Phelan ; David C. Wallace ; Kathryn E. Arpino ; James R. Neilson ; Kenneth J. Livi ; Che R. Seabourne ; Andrew J. Scott ; Tyrel M. McQueen
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：April 10, 2013
• 年：2013
• 卷：135
• 期：14
• 页码：5372-5374
• 全文大小：223K
• 年卷期：v.135,no.14(April 10, 2013)
• ISSN：1520-5126

文摘

High-temperature superconductivity has a range of applications from sensors to energy distribution. Recent reports of this phenomenon in compounds containing electronically active BiS₂ layers have the potential to open a new chapter in the field of superconductivity. Here we report the identification and basic properties of two new ternary Bi鈥揙鈥揝 compounds, Bi₂OS₂ and Bi₃O₂S₃. The former is non-superconducting; the latter likely explains the superconductivity at T_c = 4.5 K previously reported in 鈥淏i₄O₄S₃鈥? The superconductivity of Bi₃O₂S₃ is found to be sensitive to the number of Bi₂OS₂-like stacking faults; fewer faults correlate with increases in the Meissner shielding fractions and T_c. Elucidation of the electronic consequences of these stacking faults may be key to the understanding of electronic conductivity and superconductivity which occurs in a nominally valence-precise compound.