Nanoscale Electronic Order in Iron Pnictides

Lang, G. and Grafe, H.-J. and Paar, Dalibor and Hammerath, F. and Manthey, K. and Behr, G. and Werner, J. and Buchner, B. (2010) Nanoscale Electronic Order in Iron Pnictides. Physical Review Letters, 104 (9). pp. 97001-4. ISSN 0031-9007

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The charge distribution in RFeAs (R=La, Sm) iron pnictides is probed using As NQR. Whereas undoped and optimally-doped/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 at 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.

Item Type: Article
Keywords: pnictides, charge distribution, NQR
Date: March 2010
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2010) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191458-1022
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 31 May 2014 22:24
Last Modified: 24 Feb 2016 15:36

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