Determination of spin polarization using an unconventional iron superconductor | Zendy

Jessica Gifford | Zendy; B. B. Chen | Zendy; Junshan Zhang | Zendy; Ge Zhao | Zendy; D. R. Kim | Zendy; B. C. Li | Zendy; Di Wu | Zendy; Tingyong Chen | Zendy

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Determination of spin polarization using an unconventional iron superconductor

Author(s) -

Jessica Gifford,

B. B. Chen,

Junshan Zhang,

Ge Zhao,

D. R. Kim,

B. C. Li,

Di Wu,

Tingyong Chen

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4968620

Subject(s) - andreev reflection , superconductivity , pairing , condensed matter physics , spin polarization , polarization (electrochemistry) , spectroscopy , materials science , spin (aerodynamics) , chemistry , physics , quantum mechanics , electron , thermodynamics

An unconventional iron superconductor, SmO0.7F0.3FeAs, has been utilized to determine the spin polarization and temperature dependence of a highly spin-polarized material, La0.67Sr0.33MnO3, 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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