Josephson vortex flow in superconducting single-crystal Bi2Sr2CaCu2Ox

Abstract

Using various size rectangular mesas formed by photolithographically patterning and etching on single-crystal Bi2Sr2Ca1Cu2Ox superconductors, we have obtained c-axis volt-ampere characteristics as a function of magnetic field applied parallel to the a-b planes. Enhanced sensitivity with field perpendicular to the long side was observed even in mesas with dimensions smaller than the magnetic penetration depth λc. This can be explained in terms of viscous flow of Josephson vortices. The measurements are in good quantitative agreement with theoretical models for Josephson vortex motion in layered superconductors. Vortex flow coexists with the multiple hysteretic structure previously presented as evidence that this material behaves as a stack of underdamped intrinsic Josephson junctions.

Edge critical currents of dense Josephson vortex lattice in layered superconductors

“…Recently, dynamic properties of this lattice in BSCCO have been subject of extensive experimental research 4,5,6,7 . At high fields (above 0.5 tesla for BSCCO) the Josephson vortices homogeneously fill all layers 8,9 (dense Josephson vortex lattice, see Fig.…”

Resonances, Instabilities, and Structure Selection of Driven Josephson Lattice in Layered Superconductors

“…[1][2][3] Moving JVL generates travelling electromagnetic wave in the medium. Similar to the Eck resonance in a single junction [6], one expects a strong resonance emission when the velocity of the lattice matches the plasma wave velocity.…”

Josephson Vortices in High Tc Superconductors

“…In the solid phase, it is difficult to study the state because of that resistivity usually goes to zero due to the pinning effects from quenched disorder. However, a collective JV flow appears in the c-axis resistance even at low temperatures (Lee et al 1995). The periodic oscillations mentionend above is an indirect experimental evidence of forming a triangular lattice in JV system of strongly anisotropic superconductors, but is considered to be a unique experimental probe to confirm the 3D-ordered state in JVs.…”