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Title: Determination of spin polarization using an unconventional iron superconductor

Here, an unconventional iron superconductor, SmO 0.7F 0.3FeAs, has been utilized to determine the spin polarization and temperature dependence of a highly spin-polarized material, La 0.67Sr 0.33MnO 3, with Andreev reflection spectroscopy. The polarization value obtained is the same as that determined using a conventional superconductor Pb but the temperature dependence of the spin polarization can be measured up to 52 K, a temperature range, which is several times wider than that using a typical conventional superconductor. The result excludes spin-parallel triplet pairing in the iron superconductor.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [1] ; ORCiD logo [1] ; ORCiD logo [2] ; ORCiD logo [1]
  1. Arizona State Univ., Tempe, AZ (United States)
  2. Nanjing Univ. (China)
Publication Date:
Grant/Contract Number:
SC0012670
Type:
Published Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 6; Journal Issue: 11; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Research Org:
Arizona State Univ., Tempe, AZ (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1333017
Alternate Identifier(s):
OSTI ID: 1361531; OSTI ID: 1421185