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Orbital Occupancy and Charge Doping in Iron‐Based Superconductors
Author(s) -
Cantoni Claudia,
Mitchell Jonathan E.,
May Andrew F.,
McGuire Michael A.,
Idrobo JuanCarlos,
Berlijn Tom,
Dagotto Elbio,
Chisholm Matthew F.,
Zhou Wu,
Pennycook Stephen J.,
Sefat Athena S.,
Sales Brian C.
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201401518
Subject(s) - superconductivity , scanning transmission electron microscopy , magnetic moment , condensed matter physics , materials science , electron energy loss spectroscopy , doping , electron , moment (physics) , charge (physics) , transmission electron microscopy , spectroscopy , nanotechnology , physics , quantum mechanics
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.