Ferromagnetic-semiconductor–singlet-(or triplet) superconductor–ferromagnetic-semiconductor systems as possible logic circuits and switches
Ferromagnetic-semiconductor–singlet-(or triplet) superconductor–ferromagnetic-semiconductor systems as possible logic circuits and switches
复制标题
铁磁半导体-单线态（或三线态）超导体-铁磁半导体系统作为可能的逻辑电路和开关
DOI：
10.1103/physrevb.62.11846
复制
发表时间：
1999
影响因子：
3.7
通讯作者：
M. Endres
中科院分区：
文献类型：
--
作者：
M. Kulić;M. Endres
We consider thin superconducting (S) films of thickness $d\ensuremath{\ll}{\ensuremath{\xi}}_{0},$ sandwiched between two ferromagnetic semiconducting insulators (FI) with differently orientated magnetizations\char22{}the $\mathrm{F}\mathrm{I}\ensuremath{-}S\ensuremath{-}\mathrm{F}\mathrm{I}$ system. We calculate the dependence of the superconducting critical temperature on the orientation of the magnetization in the insulators and on the thickness of the superconducting film. The calculations are done for singlet as well as triplet superconductors. In the singlet case ${T}_{c}$ depends on the relative orientation of the left and right magnetization only, while in the triplet case ${T}_{c}$ depends on the absolute orientation of magnetization. The latter property can serve as a kind of spin spectroscopy of triplet and unconventional superconductors, for instance in resolving the structure of the triplet order parameter in the recently discovered layered superconductor ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}.$ The possibility of logic circuits and switches, which are based on the $\mathrm{F}\mathrm{I}\ensuremath{-}S\ensuremath{-}\mathrm{F}\mathrm{I}$ systems with arbitrary orientation of magnetizations in FI films, is analyzed too.
We consider thin superconducting (S) films of thickness $d\ensuremath{\ll}{\ensuremath{\xi}}_{0},$ sandwiched between two ferromagnetic semiconducting insulators (FI) with differently orientated magnetizations\char22{}the $\mathrm{F}\mathrm{I}\ensuremath{-}S\ensuremath{-}\mathrm{F}\mathrm{I}$ system. We calculate the dependence of the superconducting critical temperature on the orientation of the magnetization in the insulators and on the thickness of the superconducting film. The calculations are done for singlet as well as triplet superconductors. In the singlet case ${T}_{c}$ depends on the relative orientation of the left and right magnetization only, while in the triplet case ${T}_{c}$ depends on the absolute orientation of magnetization. The latter property can serve as a kind of spin spectroscopy of triplet and unconventional superconductors, for instance in resolving the structure of the triplet order parameter in the recently discovered layered superconductor ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}.$ The possibility of logic circuits and switches, which are based on the $\mathrm{F}\mathrm{I}\ensuremath{-}S\ensuremath{-}\mathrm{F}\mathrm{I}$ systems with arbitrary orientation of magnetizations in FI films, is analyzed too.