Shapiro step at nonequilibrium conditions. (16th August 2016)

• Record Type: Journal Article
• Authors: Shukrinov, Yu. M.; Nashaat, M.; Kulikov, K. V.; Dawood, R.; El Samman, H.; El Sherbini, Th. M.
• Is Part Of: Europhysics letters. Volume 115:Number 2(2016:Jul.)
• Publication Date: 2016-08-16
• Subjects: 03.75.Lm -- 05.70.Ln; Physics -- Periodicals; Electronic journals; 530.05
• DOI: 10.1209/0295-5075/115/20003
• Languages: English
• ISSNs: 0295-5075

Abstract

Abstract: Detailed numerical simulations of intrinsic Josephson junctions of high-temperature superconductors under external electromagnetic radiation are performed taking into account a charge imbalance effect. We demonstrate that the charge imbalance is responsible for a slope in the Shapiro step in the IV-characteristic. The value of slope increases with a nonequilibrium parameter. Coupling between junctions leads to the distribution of the slope's values along the stack. The nonperiodic boundary conditions shift the Shapiro step from the canonical position determined by, where f is a frequency of external radiation. This fact makes the interpretation of the experimentally found Shapiro step shift by the charge imbalance effect ambiguous.