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

页码：6193 / +

页数：7

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