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Title: Controllable 0 − π transition in iron pnictide superconductor junctions with a spacer of strong ferromagnet

Abstract

We investigate the control of 0−π transition in Josephson junctions consisting of a highly spin-polarized ferromagnet coupled to two iron pnictide superconductors (SCs). It is shown that, a 0−π transition as a function of interband coupling strength is always exhibited, which can be experimentally used to discriminate the s{sub ±}-wave pairing symmetry in the iron pnictide SCs from the s{sub ++}-wave one in MgB{sub 2}. By tuning the doping level in the s{sub ±}-wave SCs, one can vary the interband coupling strength so as to obtain the controllable 0−π transition. This device may be realized with current technologies and has practical use in Cooper pair spintronics and quantum information.

Authors:
; ;  [1];  [2]
  1. Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210023 (China)
  2. Department of Physics, Yangzhou University, Yangzhou 225002 (China)
Publication Date:
OSTI Identifier:
22257706
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COOPER PAIRS; IRON; JOSEPHSON JUNCTIONS; MAGNESIUM BORIDES; QUANTUM INFORMATION; SPIN ORIENTATION; SUPERCONDUCTORS

Citation Formats

Liu, S. Y., Tao, Y. C., E-mail: yctao88@163.com, Ji, T. T., Di, Y. S., and Hu, J. G. Controllable 0 − π transition in iron pnictide superconductor junctions with a spacer of strong ferromagnet. United States: N. p., 2014. Web. doi:10.1063/1.4869226.
Liu, S. Y., Tao, Y. C., E-mail: yctao88@163.com, Ji, T. T., Di, Y. S., & Hu, J. G. Controllable 0 − π transition in iron pnictide superconductor junctions with a spacer of strong ferromagnet. United States. https://doi.org/10.1063/1.4869226
Liu, S. Y., Tao, Y. C., E-mail: yctao88@163.com, Ji, T. T., Di, Y. S., and Hu, J. G. 2014. "Controllable 0 − π transition in iron pnictide superconductor junctions with a spacer of strong ferromagnet". United States. https://doi.org/10.1063/1.4869226.
@article{osti_22257706,
title = {Controllable 0 − π transition in iron pnictide superconductor junctions with a spacer of strong ferromagnet},
author = {Liu, S. Y. and Tao, Y. C., E-mail: yctao88@163.com and Ji, T. T. and Di, Y. S. and Hu, J. G.},
abstractNote = {We investigate the control of 0−π transition in Josephson junctions consisting of a highly spin-polarized ferromagnet coupled to two iron pnictide superconductors (SCs). It is shown that, a 0−π transition as a function of interband coupling strength is always exhibited, which can be experimentally used to discriminate the s{sub ±}-wave pairing symmetry in the iron pnictide SCs from the s{sub ++}-wave one in MgB{sub 2}. By tuning the doping level in the s{sub ±}-wave SCs, one can vary the interband coupling strength so as to obtain the controllable 0−π transition. This device may be realized with current technologies and has practical use in Cooper pair spintronics and quantum information.},
doi = {10.1063/1.4869226},
url = {https://www.osti.gov/biblio/22257706}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 11,
volume = 104,
place = {United States},
year = {Mon Mar 17 00:00:00 EDT 2014},
month = {Mon Mar 17 00:00:00 EDT 2014}
}