Study of binary and pseudo-binary intermetallic compounds with AlB2 structure

R. L. Meng, B. Lorenz, Y. S. Wang, J. Cmaidalka, Y. Y. Sun, Y. Y. Xue, J. K. Meen, C. W. Chu

研究成果: Article同行評審

29 引文 斯高帕斯(Scopus)

摘要

We have synthesized and studied the binary intermetallic compounds, AGa2 and A[GaxSi2-x] (A = Sr, Ba, Ca), which are isostructural to the newly discovered 40 K superconductor MgB2. The binary compounds AGa2 were found to be non-superconducting above 2 K, even though they have the same valence electron number per formula as MgB2 and greater lattice parameters than MgB2. However, by varying the valence electron number, they become superconducting. This result suggests that the electronic structures of this class of compounds depend on more than just the valence electron density and the lattice parameters. The theoretical prediction that the Tc of MgB2 could be enhanced with the proper dopant to increase its carrier density or to expand the lattice could not be verified.

原文English
頁(從 - 到)113-116
頁數4
期刊Physica C: Superconductivity and its applications
382
發行號1
DOIs
出版狀態Published - 2002 10月 15

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 能源工程與電力技術
  • 電氣與電子工程

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