Premium
Possible existence of field‐induced Josephson junctions
Author(s) -
Pomorski Krzysztof,
Prokopow Przemyslaw
Publication year - 2012
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201100002
Subject(s) - josephson effect , condensed matter physics , superconductivity , pi josephson junction , physics , quantum tunnelling , superconducting tunnel junction
We demonstrate the possible existence of a new class of superconducting Josephson junctions (JJs) named field‐induced Josephson junctions (FIJJs). One representative is a junction made by placing a ferromagnetic strip on the top of a superconducting strip, which we study in this work. We obtain a possible transition between one regime of an FIJJ, which is the quasi‐tunneling weak link Josephson junction (similar in certain aspects to an S–F–S Josephson junction, but with different boundary conditions), and the second regime of an FIJJ, which is the weak link constriction (two superconductors connected by a narrow superconducting link) as a function of the thickness of the superconducting strip, magnitude of magnetization, and temperature. We use the generalized Ginzburg–Landau (GL) equations derived from the extended Hubbard model in order to determine some properties of the new class of Josephson junction. In this paper, we perform the computation for a first type of superconductor, although both types of superconductor can be used to create an FIJJ. Further directions of studies of the indicated class of Josephson junction are also described.