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Research Target and Important Results
[Brief story in simple language about following pictures.]
Fig.1. Crystal structure model of Cu-1234
Fig.2. Modification of the superconducting wave-function for the 3rd
generation high-Tc superconductor
Fig.3. Tc versus the hole concentration per CuO2 plane for high-Tc
superconductors. Only the Cu-1234 system sustains the Tc above 116 K.
Fig.4. Approaching to the mountain of the best performance
superconductor
Fig.5. Crystal structure models of the 1st, 2nd and 3rd generation
high-Tc superconductors
Fig.6. Electronic structure model of the 3rd generation
high-Tc
superconductor
Fig.7. Jc dependence on crystal angle for superconducting symmetries of d,
d+is, d+id and s waves
Fig.8. Crystal structure model of (CuBa2Can-1CunO2n+4-y:n=3-5)
Fig.9. Band structure and Fermi surfaces of Cu-1234(O11)
Fig.10. Superconducting anisotropy vs. Tc for representative materials
Fig.11. Coherence length and superconducting anisotropy versus numbers
of CuO2 layer
Fig.12. Tc versus hole concentration per CuO2 plane for Cu-1234 system
Fig.13. Tc resistivity, hole concentration and weight loss versus
annealing temperature for Cu1-xTlx-1223 sample
Fig.14. Doping dependence of Ks(T) perpendicular to the c-axis in
multilayeres cuprates:(a) n=3, (b) n=4 and (c) n=5. The dotted line shows the
optimally doped region for Ks at RT.
Fig.15. T-dependence of T-derivatives of Ks,ab, d(Ks,ab)/dT for n=3,4 and 5
compounds. The dotted line (arrow) shows tc (t*). tc is the peak point of
d(Ks,ab)/dt
and t*(K) is the inflection point of d(Ks,ab)/dt. The solid arrow shows bulk
Tc.
Fig.16. Two peaks at Tc=117 K and Tc2=70 K in specific heat for over doped
Cu-1234
Fig.17. Magnetic field dependence of Jc for Cu1-xTlx-1223
(x~0.5)
thin films
Table 1. List of parameters for various high-Tc compounds
Table 2. Comparison of Superconducting properties among the
representative high-Tc superconductors
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