Dynamic behavior of Josephson-coupled layered structures

R. Kleiner; P. Müller; H. Kohlstedt; N. F. Pedersen; S. Sakai

doi:10.1103/PhysRevB.50.3942

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Dynamic behavior of Josephson-coupled layered structures

R. Kleiner, P. Müller, H. Kohlstedt, N. F. Pedersen, S. Sakai

DOI 10.1103/PhysRevB.50.3942 · Physical Review B

T1

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Abstract

We have investigated Josephson effects in stacks of both artificial and natural Josephson junctions. The measurements have been performed on Nb/Al-AlOx/Nb multilayers and on small single crystals of Bi2Sr2CaCu2O8. Both systems exhibit multiple branched I-V characteristics in zero magnetic field. In finite magnetic fields coupling via currents flowing along the superconducting layers is essential, since the layers are thinner than the London penetration depth. All observations are in good agreement with numerical simulations of stacks of coupled Josephson junctions. These simulations predict that a large number of junctions can be phase locked in large magnetic fields via Fiske resonances excited in all junctions.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb/Al-AlOx/Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown