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Simulating current voltage characteristics in Intrinsic Josephson junctions
M. HromnikYu. M. ShukrinovM Gaafar
BLTP, JINR, Dubna , Russia
Layered Bi2Sr2CaCu2Oy(Bi2212) single crystals represent natural stacks of atomic scale intrinsic Josephson junctions.I-V characteristics Multi-branch structure large hysteresis Roughly equal spacing
Applications of Josephson JunctionsDefines a Voltage standard - metrologyQuantum computing single electron transistorsSQUIDS superconducting quantum interface devices able to measure magnetic fields down to 10^-18 T STJs Superconducting tunnel junction detectors which make use of quantum electron tunneling through the JJ high speed electrical circuits
Numerical Procedure 4th order Runge Kutta methodHeavy duty computation O(10^9) time stepsIntelligent data logging on the fly averaging ensures a manageable and meaningful outputIntelligent disk IO buffering (significant effect of performance)Looping technique to match experimental methodParallel computing options limited
Time dependencediv (0 E) = QQl=Q0 (Vl+1-Vl)
Q0 = 0 V0/rD2
Current Voltage characteristics
Longitudinal Plasma Wave
Results from CJJ+DC model
Thank you!