Instability of a lattice semifluxon in a current-biased 0−π array of Josephson junctions
H. Susanto, S. A. van Gils
DOI 10.1103/PhysRevB.69.092507 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We consider a one-dimensional parallel biased array of small Josephson junctions with a discontinuity point characterized by a phase jump of π in the phase difference. The system is described by a spatially nonautonomous discrete sine-Gordon equation. It is shown that in the infinitely long case there is a semifluxon spontaneously generated attached to the discontinuity point. Comparing the configurations of the semifluxon, we find an energy barrier similar to the Peierls-Nabarro barrier. We calculate numerically the minimum bias current density to overcome this barrier which is a function of the lattice spacing. It is found that the minimum bias current is the critical current for the existence of static lattice semifluxons. For bias current density above the minimum value, the semifluxon changes the polarity and releases 2π fluxons. An analytical approximation to the critical current as a function of the lattice spacing is presented.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Critical current and fluxon dynamics in overdamped 0−π Josephson junctions
similarity 0.96N. Lazarides
Source status unknown — claims are unverified
Ground states and bias-current-induced rearrangement of semifluxons in 0−π long Josephson junctions
similarity 0.94E. Goldobin et al.
Source status unknown — claims are unverified
Finite-size and boundary effects on the I−V characteristics of two-dimensional superconducting networks
similarity 0.94Lei-Han Tang & Qing-Hu Chen
Source status unknown — claims are unverified
Topological transconductance quantization in a four-terminal Josephson junction
similarity 0.94Erik Eriksson et al.
Source status unknown — claims are unverified
Micromagnetic modeling of critical current oscillations in magnetic Josephson junctions
similarity 0.94I. A. Golovchanskiy et al.
Source status unknown — claims are unverified
Signatures of topological transitions in the spin susceptibility of Josephson junctions
similarity 0.94Joseph D. Pakizer & Alex Matos-Abiague
Source status unknown — claims are unverified