Title: Simulation study of effect of magnetic field over I-V characteristic of intrinsic stacked Josephson junctions

Authors: Jamal Akhtar Khan, M. Shahabuddin

Addresses: College of Computer Engineering and Sciences at Kharj, King Saud University, P.O. Box 151, Kharj 11942 KSA; FTK Centre for Information Technology, Jamia Millia Islamia, Jamia Nagar, New Delhi 110 025 India. ' Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, KSA; Department of Physics, Jamia Millia Islamia, New Delhi 110025, India

Abstract: Josephson junction (JJ) is natural high frequency source tuneable up to terahertz. However the line width of single JJ is large and maximum power is small. The line width can be narrowed and power can be increased by using phase locked arrays of many nearly identical JJs. The single crystal and c-axis oriented CuO based high temperature superconductors (HTS) are natural stacks of JJs with the CuO₂layer of 0.3 nm acting as superconducting electrodes and the Bi₂O₃ or Tl₂O₃ or Y₂O₃ or (Ba, Ca)O layers of approximately 1.0 nm acting as insulating barrier (intrinsic Josephson effect). The I-V characteristic of the intrinsic stacked Josephson junctions (ISJJ) as a function of magnetic field are simulated. ISJJ has been modelled as one dimensional series array of JJ. Each JJ of the series is considered as resistively shunted junction model in which the effect of capacitance, inductance and a current source producing white noise are included. The critical current of the ISJJ as function of magnetic field shows Fraunhoffer like pattern. The simulated results have been compared with the Tl2212 mesas experimental results. It has been found that the simulated results are in good agreement with the experimental one.

Keywords: Josephson junction array; intrinsic stacked; nano devices; nanotechnology; magnetic field; simulation.

DOI: 10.1504/IJNM.2009.028142

International Journal of Nanomanufacturing, 2009 Vol.4 No.1/2/3/4, pp.342 - 349

Published online: 07 Sep 2009 *

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