Topological competition of superconductivity in Pb/Ru/Sr2RuO4 junctions
Taketomo Nakamura, R. Nakagawa, T. Yamagishi, T. Terashima, S. Yonezawa, M. Sigrist, Y. Maeno
DOI 10.1103/PhysRevB.84.060512 · 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 devise an unconventional proximity junction configuration where an s-wave superconductivity and the superconductivity of Sr2RuO4 interfere with each other. We reproducibly observe in such a Pb/Ru/Sr2RuO4 junction with a single Pb electrode that the critical current Ic drops sharply just below the bulk Tc of Sr2RuO4 and furthermore increases again below a certain temperature below Tc. In order to explain this temperature dependence of Ic, we propose a competition effect involving topologically distinct superconducting phases around Ru inclusions. Thus, such a device may be called a topological superconducting junction.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.5 | Pressure not reported | unknown |
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.2 | Pressure not reported | unknown |
| Ru Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.5 | Pressure not reported | unknown |
Similar papers
Evolution of the filamentary 3-Kelvin phase in Pb−Ru−Sr2RuO4 Josephson junctions
similarity 0.95Hirono Kaneyasu et al.
Source status unknown — claims are unverified
Superconductivity in ultrathin quench-condensed Pb/Sb and Pb/Ge multilayers
similarity 0.95P. Xiong et al.
Source status unknown — claims are unverified
Suppression of Proximity Effect and the Enhancement of p-Wave Superconductivity in the Sr2RuO4-Ru System
similarity 0.95Y. A. Ying et al.
Source status unknown — claims are unverified
Enhancement of Superconductivity of Sr2RuO4 to 3 K by Embedded Metallic Microdomains
similarity 0.95Y. Maeno et al.
Source status unknown — claims are unverified
Observation of superconducting gap spectra of long-range proximity effect in Au/SrTiO3/SrRuO3/Sr2RuO4 tunnel junctions
similarity 0.94M. S. Anwar et al.
Source status unknown — claims are unverified
Two-band superconductivity in Pb from ab initio calculations
similarity 0.94A. Floris et al.
Source status unknown — claims are unverified