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Adv Mater. 2014 Sep 17;26(35):6193-8. doi: 10.1002/adma.201401518. Epub 2014 Jul 28.

Orbital occupancy and charge doping in iron-based superconductors.

Author information

1
Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.

Abstract

The intrinsic Fe local magnetic moment and Fe orbital occupations of iron-based superconductors are unveiled through the local, real-space capability of aberration-corrected scanning transmission electron microscopy/electron energy loss spectroscopy (STEM/EELS). Although the ordering of Fe moments needs to be suppressed for superconductivity to arise, the local, fluctuating Fe magnetic moment is enhanced near optimal superconductivity.

KEYWORDS:

electron energy loss spectroscopy (EELS); iron-based superconductors; local magnetic moments; scanning transmission electron microscopy (STEM)

PMID:
25070045
DOI:
10.1002/adma.201401518
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