Triplet Josephson effect with magnetic feedback in a superconductor-ferromagnet heterostructure.
نویسندگان
چکیده
We study the ac Josephson effect in a superconductor-ferromagnet heterostructure with a variable magnetic configuration. The system supports triplet proximity correlations whose dynamics is coupled to the magnetic dynamics. This feedback dramatically modifies the behavior of the junction. The current-phase relation becomes double periodic at both very low and high Josephson frequencies omegaJ. At intermediate frequencies, the periodicity in omegaJt may be lost.
منابع مشابه
Odd Triplet Superconductivity and Related Phenomena in Superconductor-Ferromagnet Structures
We consider novel unusual effects in superconductor-ferromagnet (S/F) structures. In particular we analyze the triplet component (TC) of the condensate generated in those systems.This component is odd in frequency and even in the momentum, which makes it insensitive to non-magnetic impurities. If the exchange field is not homogeneous in the system the triplet component is not destroyed even by ...
متن کاملLong-range superharmonic Josephson current and spin-triplet pairing correlations in a junction with ferromagnetic bilayers
The long-range spin-triplet supercurrent transport is an interesting phenomenon in the superconductor/ferromagnet () heterostructure containing noncollinear magnetic domains. Here we study the long-range superharmonic Josephson current in asymmetric junctions. It is demonstrated that this current is induced by spin-triplet pairs - or + in the thick layer. The magnetic rotation of the partic...
متن کاملFully developed triplet proximity effect.
We present a model for the fully developed proximity effect in superconductor-ferromagnet heterostructures. Within the circuit-theory approximation, we evaluate the Green functions, the density of states, and the Josephson current which depend essentially on the magnetic configuration.
متن کاملJosephson effect in multi-terminal superconductor-ferromagnet junctions coupled via triplet components
On the basis of the Usadel equation we study a multi-terminal Josephson junction. This junction is composed by “magnetic” superconductors Sm which have singlet pairing and are separated from the normal n wire by spin filters so that the Josephson coupling is caused only by fully polarized triplet components. We show that there is no interaction between triplet Cooper pairs with antiparallel tot...
متن کاملNonhomogeneous magnetization and superconductivity in superconductor-ferromagnet structures
We study two different superconductor-ferromagnet (S/F) structures. We consider first a Josephson junction which consists of two S/F bilayers separated by an insulating layer. We show that for an antiparallel alignment of the magnetization in the two F layers the Josephson critical current Ic increases with increasing exchange field h. The second system we consider is a S/F structure with a loc...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 100 20 شماره
صفحات -
تاریخ انتشار 2008