Physical Review B (Condensed Matter) -- June 1, 1997
-- Volume 55, Issue 21,
pp. 14499-14512
Disorder in two-dimensional Josephson junctions
Baruch Horovitz and Anatoly Golub
Department of Physics, Ben-Gurion University, Beer-Sheva, 84105, Israel
(Received 18 July 1996)
An effective free energy of a two-dimensional (i.e., large area) Josephson
junction is derived,
allowing for thermal fluctuations, random magnetic fields, and external
currents. We show by using
replica-symmetry-breaking methods that the junction has four distinct phases:
disordered, Josephson ordered, a glass phase, and a coexisting Josephson order
with the glass phase. Near the coexistence to glass transition at s = the
critical current is ~ ( area)s + 1/2 where s is a measure of disorder.
Our results may account for junction ordering at temperatures well below the
critical temperature of the bulk in high-Tc trilayer junctions. ©1997
The American Physical Society
PACS: 74.50.+r, 75.50.Lk, 99.10.+g
See Also
Erratum
B. Horovitz and A. Golub
Phys. Rev. B 57, 656 (1998).
link to