Weak-link magnetically modulated resistance response in granular superconducting systems
- Department of Physics and Astronomy, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218 (United States)
- Applied Physics Laboratory, The Johns Hopkins University, Johns Hopkins Road, Laurel, Maryland 20723 (United States)
Experimentally, magnetically modulated resistance (MMR) techniques are effective in ascertaining the properties of granular superconductors, which can be modeled as a network of Josephson junctions. Each junction is parametrized by a critical current, with a capacitance and resistance in parallel to account for the nonsupercurrent components. The overall current-voltage behavior of the network, in the presence of an external magnetic field, is given by a set of coupled nonlinear ordinary differential equations, which are studied numerically. Features of interest in the simulated experiments arise from effects of the applied field on couplings, and the transitions between multiple solution classes of the differential equations. Through these simulations of the phase dynamics, details of the weak link MMR signal can be understood, the typical signal being reproduced with large enough networks.
- OSTI ID:
- 6691766
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Vol. 51:2; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
SUPERCONDUCTORS
ELECTRICAL PROPERTIES
CRITICAL CURRENT
GRANULAR MATERIALS
JOSEPHSON JUNCTIONS
MAGNETIC FIELDS
CURRENTS
ELECTRIC CURRENTS
JUNCTIONS
MATERIALS
PHYSICAL PROPERTIES
SUPERCONDUCTING JUNCTIONS
665411* - Basic Superconductivity Studies- (1992-)