Resistance oscillations and magnetic fingerprints in superconducting Au0.7In0.3 cylinders
Yu. Zadorozhny, D. R. Herman, Y. Liu
DOI 10.1103/PhysRevB.63.144521 · 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
Magnetoresistance of hollow Au0.7In0.3 cylinders of submicron diameter was measured in the superconducting transition regime. Depending on the amount of disorder present in the samples, resistance oscillations were either absent or found only below a certain temperature in the transition regime. For those samples where the resistance oscillations were completely suppressed, reproducible sample-specific magnetoresistance fluctuations (magnetic fingerprints) were observed, also in the low-temperature part of the transition regime. The amplitude of the conductance fluctuation exceeded that of the universal conductance fluctuation in normal metals by several orders of magnitude. The fluctuation disappeared as superconductivity in the samples was suppressed by increasing either temperature or magnetic field. Thermal cycling to temperatures much higher than the superconducting critical temperature resulted in irreversible changes in the fingerprint pattern. In addition, a negative magnetoresistance was found just above the transition temperature in some samples. The physical origin of these observations is discussed in the context of mesoscopic effects in disordered superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Au0.7In0.3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.6 | Pressure not reported | onset |
Similar papers
Magnetic Fingerprints in Superconducting AuIn Cylinders
similarity 0.97Yu. Zadorozhny et al. · 2000 · arXiv:cond-mat/0011522
Source status unknown — claims are unverified
Structural and electrical transport properties of superconducting Au0.7In0.3 films: A random array of superconductor–normal-metal–superconductor Josephson junctions
similarity 0.91Yu. Zadorozhny & Y. Liu
Source status unknown — claims are unverified
Observation of Magnetic Fingerprints in Superconducting Au_0.7In_0.3 Cylinders
similarity 0.91Yu. Zadorozhny et al. · 1999 · arXiv:cond-mat/9908281
Source status unknown — claims are unverified
Phase memory effects in mesoscopic rings with superconducting ‘‘mirrors’’
similarity 0.89V. T. Petrashov et al.
Source status unknown — claims are unverified
Anomalous oscillatory magnetoresistance in superconductors
similarity 0.89Milind N. Kunchur et al.
Source status unknown — claims are unverified
Scaling magnetoresistance induced by superconducting contacts in n-type GaAs
similarity 0.88R. G. Mani et al.
Source status unknown — claims are unverified