Volume 96, Number 1, October 2011
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||21 September 2011|
Ferromagnetic proximity effect in a ferromagnet/iron-pnictide superconductor junction
Department of Physics, Nanjing Normal University - Nanjing 210097, China
2 Department of Physics, Yangzhou University - Yangzhou 225002, China
Accepted: 17 August 2011
The proximity effect in a bilayer consisting of a ferromagnet (FM) and an iron-pnictide superconductor (SC) with antiphase s-wave pairing is first studied by extending Nambu spinor Green's function approach. Due to the opposite signs of the two pair potentials in the SC, the order parameters in the FM and SC regions at the interface induced by the proximity effect are not only noncontinuous but also antiphase and the barrier strength has a significant influence on the peak and dip behaviors of the induced superconducting density of states (DOS) in the two regions. Particularly, one conspicuously characteristic peak of the DOS at either gap energy in the SC appears. These properties are much different from those without antiphase s-wave pairing for the SC, which can be applied to experimentally identify the antiphase s-wave pairing in iron-based SCs.
PACS: 74.45.+c – Proximity effects; Andreev reflection; SN and SNS junctions / 74.50.+r – Tunneling phenomena; Josephson effects / 74.20.Rp – Pairing symmetries (other than s-wave)
© EPLA, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.