Measurements and modeling of the microwave impedance in high-Tcgrain-boundary Josephson junctions: Fluxon generation and rf Josephson-vortex dynamics

1998 ◽  
Vol 57 (21) ◽  
pp. 13833-13844 ◽  
Author(s):  
Y. M. Habib ◽  
C. J. Lehner ◽  
D. E. Oates ◽  
L. R. Vale ◽  
R. H. Ono ◽  
...  
Keyword(s):  
Vortex Dynamics ◽  
Josephson Junctions ◽  
Josephson Vortex

JOSEPHSON VORTEX FLOW IN Bi2Sr2CaCu2Oy INTRINSIC JOSEPHSON JUNCTIONS

1999 ◽  
Vol 13 (29n31) ◽  
pp. 3678-3681 ◽  
Author(s):  
AKINOBU IRIE ◽  
SHOICHI KANEKO ◽  
GIN-ICHIRO OYA
Keyword(s):  
Electromagnetic Wave ◽  
Field Dependence ◽  
Vortex Dynamics ◽  
Josephson Junctions ◽  
Vortex Flow ◽  
Maximum Flow ◽  
The Other ◽  
Josephson Vortex ◽  
Intrinsic Josephson Junctions ◽  
Velocity Mode

We have studied the vortex dynamics in intrinsic Josephson junctions in mesa-shaped Bi 2 Sr 2 CaCu 2 O y single crystals. By applying magnetic fields parallel to the copper oxide layers of the junctions, Josephson vortex-flow branches were observed in addition to multiple resistive branches on the I–V characteristics. From the field dependence of the maximum flow voltage, the flow velocity of the vortices was estimated to be ~3×106 m/s at 4.2 K, which is close to that of the highest-velocity mode of the electromagnetic wave in them. On the other hand, at 77 K, the velocity decreased from the highest to the lowest with an increase in the number of junctions in the mesas.

Josephson-vortex dynamics in intrinsic Josephson junctions

2007 ◽  
Vol 460-462 ◽  
pp. 764-765
Author(s):  
Kazuto Hirata ◽  
Shuuichi Ooi ◽  
Takashi Mochiku ◽  
Marat Gaifullin
Keyword(s):  
Vortex Dynamics ◽  
Josephson Junctions ◽  
Josephson Vortex ◽  
Intrinsic Josephson Junctions

scholarly journals Josephson vortex loops in nanostructured Josephson junctions

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
G. R. Berdiyorov ◽  
M. V. Milošević ◽  
F. Kusmartsev ◽  
F. M. Peeters ◽  
S. Savel’ev
Keyword(s):  
Josephson Junctions ◽  
Josephson Vortex ◽  
Vortex Loops

Vortex Dynamics and Phase Transitions in a Two-Dimensional Array of Josephson Junctions

1986 ◽  
Vol 56 (12) ◽  
pp. 1291-1294 ◽  
Author(s):  
Ch. Leemann ◽  
Ph. Lerch ◽  
G. -A. Racine ◽  
P. Martinoli
Keyword(s):  
Phase Transitions ◽  
Vortex Dynamics ◽  
Josephson Junctions ◽  
Two Dimensional ◽  
Dimensional Array

Three Terminal HTc Vortex Flow Transistors: Optimisation of the Device Geometry Employing Bicrystal Grain-Boundary Josephson Junctions

1999 ◽  
Vol 13 (09n10) ◽  
pp. 1253-1258
Author(s):  
V. Granata ◽  
B. A. Davidson ◽  
E. Sarnelli ◽  
S. Pagano
Keyword(s):  
High Temperature ◽  
Grain Boundary ◽  
Vortex Dynamics ◽  
High Frequency ◽  
Josephson Junctions ◽  
Vortex Flow ◽  
Operating Regime ◽  
Bias Current ◽  
Advantages And Disadvantages ◽  
Geometric Configurations

We have numerically studied the static and dynamic behavior of a three terminal vortex-flow transistor based on a parallel array of Josephson junctions. We explicitly show advantages and disadvantages for different device geometric configurations, systematically changing the symmetry of the bias-current distribution. Using parameters typical of high-temperature superconducting junctions at 77K, we have analysed for each configuration the dependence of the critical current on the control current, and the voltage-current curves. We have calculated gain and transresistance for different bias conditions, and explained the numerical results in terms of the vortex dynamics in the array. This study allows us to establish limits for the operating regime of these devices when used as high-frequency amplifiers.

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