Point-contact electron tunneling into the high-Tc superconductor Y-Ba-Cu-O
M. D. Kirk, D. P. E. Smith, D. B. Mitzi, J. Z. Sun, D. J. Webb, K. Char, M. R. Hahn, M. Naito, B. Oh, M. R. Beasley, T. H. Geballe, R. H. Hammond, A. Kapitulnik, C. F. Quate
DOI 10.1103/PhysRevB.35.8850 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We report results of a study of electron tunneling into bulk samples of the new high-Tc superconductor Y-Ba-Cu-O using point-contact tunneling. Based on a superconductive tunneling interpretation, the results show exceptionally large energy gaps in these materials (roughly 2Δ=100 meV), implying 2Δ/kCTc∼13. Similar values were found previously by us for La-Sr-Cu-O. We also see Structure in the I-V curves similar to that seen in La-Sr-Cu-O. On the basis of the asymmetries observed in the I-V characteristics, we believe that the natural tunneling barrier on this material is of the Schottky type.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Y0.4Ba0.6CuOy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
| Y0.4Ba0.6CuOy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
Similar papers
Electron tunneling into the high-Tc superconductor Y-Ba-Cu-O
similarity 0.96M. A. M. Gijs et al.
Source status unknown — claims are unverified
Electron tunneling in the high-Tc superconductor Y-Ba-Cu-O
similarity 0.96R. Escudero et al.
Source status unknown — claims are unverified
Break-junction tunneling measurements of the high-Tc superconductor Y1Ba2Cu3O9−δ
similarity 0.95J. Moreland et al.
Source status unknown — claims are unverified
Room-temperature structure of the 90-K bulk superconductor YBa2Cu3O8−x
similarity 0.95Y. LePage et al.
Source status unknown — claims are unverified
High-Tc superconductivity in regions of possible compound formation: Y2−xBaxCuO4−x/2+δ and Y2−xBa1+xCu2O6−x/2+δ
similarity 0.95Shiou-Jyh Hwu et al.
Source status unknown — claims are unverified
Tunneling measurement of the energy gaps in the superconductors Y-Ba-Cu-O and Tl-Ba-Ca-Cu-O
similarity 0.95Wang Lanping et al.
Source status unknown — claims are unverified