Current distribution of collective thermal depinning of Josephson vortices in naturally stacked Josephson junctions

Gil-Ho Lee; Yong-Duk Jin; Hu-Jong Lee

doi:10.1103/PhysRevB.81.174508

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Current distribution of collective thermal depinning of Josephson vortices in naturally stacked Josephson junctions

Gil-Ho Lee, Yong-Duk Jin, Hu-Jong Lee

DOI 10.1103/PhysRevB.81.174508 · Physical Review B

T1

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Abstract

We investigated the thermal-depinning current (Ic) distribution of Josephson vortices (JVs) in naturally stacked Bi2Sr2CaCu2O8+δ intrinsic Jospehson junctions in tesla-range magnetic fields and at different field tilt angles from the in-plane position. The Ic distribution in the thermal-activation regime contains accurate information on the bias and magnetic-field dependence of the Josephson-vortex pinning potential. In a few-tesla-range magnetic field, JVs in a row in a junction, strongly coupled with each other, are pinned or depinned like a single physical entity at a single pinning center. In the best-aligned in-plane magnetic field, the edge pinning is most relevant and is insensitive to the field strength. In the presence of pancake vortices (PVs) in a slightly tilted field, however, the PV pinning deepens the JV pinning potential linearly with the number of PVs.

Source-reported materials — not catalogue approval

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