Determination of spin polarization using an unconventional iron superconductor

Gifford, J. A.; Chen, B. B.; Zhang, J.; Zhao, G. J.; Kim, D. R.; Li, B. C.; Wu, D.; Chen, T. Y.

doi:10.1063/1.4968620

Title: Determination of spin polarization using an unconventional iron superconductor

Journal Article · Tue Nov 01 00:00:00 EDT 2016 · AIP Advances

DOI:https://doi.org/10.1063/1.4968620· OSTI ID:1333017

Gifford, J. A.; Chen, B. B.; Zhang, J.; Zhao, G. J.; Kim, D. R.;

;

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_0.33MnO₃, 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.

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Research Organization:: Arizona State Univ., Tempe, AZ (United States); Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012670

OSTI ID:: 1333017

Alternate ID(s):: OSTI ID: 1361531; OSTI ID: 1421185

Journal Information:: AIP Advances, Journal Name: AIP Advances Vol. 6 Journal Issue: 11; ISSN 2158-3226

Publisher:: American Institute of PhysicsCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 2 works

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Discovery of a magnetic conductive interface in PbZr0.2Ti0.8O3 /SrTiO3 heterostructures Zhang, Yi; Xie, Lin; Kim, Jeongwoo Nature Communications, Vol. 9, Issue 1 https://doi.org/10.1038/s41467-018-02914-9	journal	February 2018

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