Orbital Occupancy and Charge Doping in Iron-Based Superconductors

被引：13
|
作者：
Cantoni, Claudia [1 ]
Mitchell, Jonathan E. [1 ]
May, Andrew F. [1 ]
McGuire, Michael A. [1 ]
Idrobo, Juan-Carlos [1 ,2 ,3 ]
Berlijn, Tom [3 ,4 ]
Dagotto, Elbio [5 ]
Chisholm, Matthew F. [1 ]
Zhou, Wu [1 ,2 ]
Pennycook, Stephen J. [1 ]
Sefat, Athena S. [1 ]
Sales, Brian C. [1 ]
机构：
[1] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA
[2] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA
[3] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA
[4] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA
[5] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
来源：
ADVANCED MATERIALS | 2014年 / 26卷 / 35期
基金：
美国国家科学基金会;
关键词：
X-RAY-ABSORPTION; MAGNETIC-BEHAVIOR; TRANSITION; A(X)FE(2)SE(2); PNICTIDES; RATIO;
D O I：
10.1002/adma.201401518
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
引用
收藏
页码：6193 / +
页数：7
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