Title: Simulation of effect of microwave irradiation on I-V characteristics of Josephson junction using RCLSJ model with noise into consideration

Authors: M. Shahabuddin

Addresses: Department of Physics and Astronomy, College of Science, P.O. Box 2455, King Saud University, Riyadh, 11451, KSA; Department of Physics, Jamia Millia Islamia, New Delhi 110025, India

Abstract: I-V characteristics of Josephson junction (JJ) under microwave irradiation is simulated taking the resistance, capacitance and inductance of the junction (RCLSJ) into account. Since most of the JJ made with high T_C material operates at high temperature where the thermal fluctuation is playing significant role. In the present simulation, thermal noise is also taken into consideration and simulated result explains the rounding behaviour of the Shapiro step observed in the experimental I-V curve. The simulated results also confirm the growing of Shapiro steps with increasing microwave power. This model also clearly account for the appearance of broad minima and reduction of the maxima in the power dependence of the step amplitude ΔI_n/2I_c as observed in the experimental data of Kautz et al. (1992).

Keywords: nano devices; Josephson junction; Shapiro steps; I-V characteristics; resistively capacitively inductively shunted junction model; RCLSJ model; simulation; microwave irradiation; nanotechnology; thermal fluctuation.

DOI: 10.1504/IJNBM.2009.027729

International Journal of Nano and Biomaterials, 2009 Vol.2 No.1/2/3/4/5, pp.331 - 338

Published online: 08 Aug 2009 *

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