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Structural changes and redistribution of holes in Ca-doped YBa2Cu4O8

✍ Scribed by Pedro Berastegui; Masato Kakihana; Sten G. Eriksson; Shigeru Nishio; Hiromasa Mazaki; Hiroshi Yasuoka; Minoru Osada; Masatomo Yashima; Masahiro Yoshimura

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
163 KB
Volume
235-240
Category
Article
ISSN
0921-4534

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πŸ“œ SIMILAR VOLUMES

Evidence against hole formation by Ca in
Evidence against hole formation by Ca in YBa2Cu4O8
✍ M. Knupfer; N. NΓΌcker; M. Alexander; H. Romberg; P. Adelmann; J. Fink; J. Karpin πŸ“‚ Article πŸ“… 1991 πŸ› Elsevier Science 🌐 English βš– 391 KB

We report on electron energy-loss studies of Ca-doped YBa2Cu4Os. O I s and Ca 2p absorption edges indicate that there is almost no change of the hole concentration upon Ca doping and that a major fraction of the Ca enters the Ba site. This suggests that the increase of Tc upon Ca doping is not cause