Current-voltage characteristics of intrinsic Bi2Sr2CaCu2O8 Josephson-junction stacks and an unconventional temperature dependence of the magnitude of the order parameter
Mikitaka Itoh, Shin-ichi Karimoto, Kazuichi Namekawa, Minoru Suzuki
DOI 10.1103/PhysRevB.55.R12001 · 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
Very thin stacks of five intrinsic Josephson junctions have been fabricated on the surface of Bi2Sr2CaCu2O8 single crystals. The current-voltage characteristics of these stacks are in good agreement with those of a superconductor-insulator-superconductor tunnel junction made of a two-dimensional d-wave superconductor. This strongly suggests that there is no gap suppression caused by the nonequilibrium heating effect, which is usually significant in stacked junctions of this kind. From these results, we obtain a gap value of 57 meV at 4.2 K for the Bi2Sr2CaCu2O8 system. Furthermore, it is definitely found that the gap magnitude exhibits significant temperature dependence even at low temperatures, which is unlike the BCS behavior.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | unknown |
Similar papers
Interaction of hot spots and terahertz waves in Bi2Sr2CaCu2O8 intrinsic Josephson junction stacks of various geometry
similarity 0.97S. Guénon et al.
Source status unknown — claims are unverified
Hot Spots and Waves in Bi2Sr2CaCu2O8 Intrinsic Josephson Junction Stacks: A Study by Low Temperature Scanning Laser Microscopy
similarity 0.97H. B. Wang et al.
Source status unknown — claims are unverified
Josephson Current and Dissipation of the c-Axis Transport in Magnetic Fields in Bi2Sr2CaCu2O8+δ
similarity 0.97Minoru Suzuki et al.
Source status unknown — claims are unverified
Josephson plasma resonance in Bi2Sr2CaCu2O8+y with spatially dependent interlayer phase coherence
similarity 0.96N. Kameda et al.
Source status unknown — claims are unverified
Terahertz Spectroscopy of Dilute Gases Using Bi2Sr2CaCu2O8+δ Intrinsic Josephson-Junction Stacks
similarity 0.96Hancong Sun et al.
Source status unknown — claims are unverified
Nonresonant microwave absorption study of intrinsic Josephson coupling in Bi2Sr2CaCu2O8 single crystals
similarity 0.96Amit Rastogi et al.
Source status unknown — claims are unverified