Anomalous Proximity Effect in Underdoped YBa2Cu3O6+x Josephson Junctions
R. S. Decca, H. D. Drew, E. Osquiguil, B. Maiorov, J. Guimpel
DOI 10.1103/PhysRevLett.85.3708 · Physical Review Letters
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
Josephson junctions were photogenerated in underdoped thin films of the YBa2Cu3O6+x family using a near-field scanning optical microscope. The observation of the Josephson effect for separations as large as 100 nm between two wires indicates the existence of an anomalously large proximity effect and shows that the underdoped insulating material in the gap of the junction is readily perturbed into the superconducting state. The critical current of the junctions was found to be consistent with the conventional Josephson relationship. This result appears to constrain the applicability of SO(5) theory to explain the phase diagram of high critical temperature superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| GdBa2Cu3O6+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89.4 | Pressure not reported | unknown |
| YBa2Cu3O6+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89.2 | Pressure not reported | unknown |
Similar papers
Josephson effect through YBa2Cu3O7−δ/Au-encapsulated nanogaps
similarity 0.92Reza Baghdadi et al.
Source status unknown — claims are unverified
Electromagnetic properties and He+ irradiation effects on YBa2Cu3O7−x grain-boundary Josephson junctions
similarity 0.92M. A. Navacerrada et al.
Source status unknown — claims are unverified
Observation of the Reverse ac Josephson Effect in Y-Ba-Cu-O at 240 K
similarity 0.92J. T. Chen et al.
Source status unknown — claims are unverified
Observation of Spontaneous Flux Generation in a Multi-Josephson-Junction Loop
similarity 0.92Raz Carmi et al.
Source status unknown — claims are unverified
Nonlocal properties of Josephson contact between anisotropic superconductors
similarity 0.92R. M. Ainbinder & G. M. Maksimova
Source status unknown — claims are unverified
Competing charge, spin, and superconducting orders in underdoped YBa2Cu3Oy
similarity 0.91M. Hücker et al.
Source status unknown — claims are unverified