期刊
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
卷 33, 期 1, 页码 11-13出版社
SPRINGER
DOI: 10.1007/s10948-019-05251-0
关键词
Cuprate; Semiconductor; Doping; Self organized; High T-c
The most prominent theoretical question for high-temperature superconductors is, Why is Tc so much higher in these materials than in conventional metallic superconductors? My answer is that the dopants (often, but not always, oxygen vacancies or interstitials) have formed self-organized percolative networks to screen the strong ionic fields in and between tetragonal layers. This model fits very well to Geballe's latest datawith T-c = 84 K on apparently overdoped Mo-YBCO sol-gel samples, showing the effectiveness of self-organization.
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