Nanoscale Electronic Order in Iron Pnictides

被引：77

作者：

Lang, G. ^{[1
]}

Grafe, H. -J. ^{[1
]}

Paar, D. ^{[1
,2
]}

Hammerath, F. ^{[1
]}

Manthey, K. ^{[1
]}

Behr, G. ^{[1
]}

Werner, J. ^{[1
]}

Buechner, B. ^{[1
]}

机构：

[1] IFW Dresden, Inst Solid State Res, D-01171 Dresden, Germany

[2] Univ Zagreb, Dept Phys, Fac Sci, HR-10002 Zagreb, Croatia

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 09期

关键词：

PHASE-DIAGRAM; SUPERCONDUCTIVITY; COEXISTENCE; SEPARATION; CHARGE; CO;

D O I：

10.1103/PhysRevLett.104.097001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The charge distribution in RFeAsO(1-x)F(x) (R = La; Sm) iron pnictides is probed using As nuclear quadrupole resonance. Whereas undoped and optimally doped or overdoped compounds feature a single charge environment, two charge environments are detected in the underdoped region. Spin-lattice relaxation measurements show their coexistence at the nanoscale. Together with the quantitative variations of the spectra with doping, they point to a local electronic order in the iron layers, where low-and high-doping-like regions would coexist. Implications for the interplay of static magnetism and superconductivity are discussed.

引用

页数：4

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